diff --git a/app/Http/Controllers/FormalAdmissionController.php b/app/Http/Controllers/FormalAdmissionController.php
new file mode 100644
index 0000000..bf6a038
--- /dev/null
+++ b/app/Http/Controllers/FormalAdmissionController.php
@@ -0,0 +1,107 @@
+<?php
+
+namespace App\Http\Controllers;
+
+use App\Enums\PurchasingRole;
+use App\Models\AdmissionAdoption;
+use App\Models\AdmissionDecision;
+use App\Models\AdmissionPolicy;
+use App\Models\AdmissionReview;
+use App\Models\PurchaseAward;
+use App\Models\Requisition;
+use App\Services\ConflictGuard;
+use App\Services\FormalAdmission;
+use App\Services\ProposalOpeningWorkflow;
+use Illuminate\Http\RedirectResponse;
+use Illuminate\Http\Request;
+use Inertia\Inertia;
+use Symfony\Component\HttpFoundation\Response;
+
+class FormalAdmissionController extends Controller
+{
+    private function access(Request $request, int $id): Requisition
+    {
+        abort_unless(in_array($request->user()->purchasing_role, [PurchasingRole::Admin, PurchasingRole::Procurement, PurchasingRole::Finance, PurchasingRole::DepartmentHead]), 403);
+
+        return Requisition::query()->visibleTo($request->user())->findOrFail($id);
+    }
+
+    public function policy(Request $request): Response
+    {
+        abort_unless($request->user()->purchasing_role === PurchasingRole::Admin, 403);
+        Inertia::encryptHistory();
+        $response = Inertia::render('purchases/admission-policy', ['policies' => AdmissionPolicy::query()->latest('revision')->paginate(20)->withQueryString(), 'latest' => AdmissionPolicy::query()->latest('revision')->first()])->toResponse($request);
+        $response->headers->set('Cache-Control', 'private, no-store, max-age=0');
+
+        return $response;
+    }
+
+    public function configure(Request $request, FormalAdmission $workflow): RedirectResponse
+    {
+        $data = $request->validate(['previous_id' => 'required|integer|min:0', 'enabled' => 'required|boolean', 'roles' => 'required|array|min:1|max:2', 'roles.*' => 'required|distinct|in:finance,department_head', 'required_count' => 'required|integer|min:1|max:50', 'reason' => 'required|string|min:10|max:4000', 'tenant_id' => 'prohibited', 'created_by' => 'prohibited', 'snapshot' => 'prohibited']);
+        $data['enabled'] = (bool) $data['enabled'];
+        $workflow->policy($request->user(), $data);
+
+        return to_route('admissions.policy');
+    }
+
+    public function show(Request $request, Requisition $requisition, FormalAdmission $workflow, ProposalOpeningWorkflow $opening): Response
+    {
+        $requisition = $this->access($request, $requisition->id);
+        $filter = $request->validate(['version' => 'nullable|integer|min:1']);
+        $adoption = $workflow->adoption($requisition);
+        $selected = isset($filter['version']) ? AdmissionAdoption::query()->where('requisition_id', $requisition->id)->findOrFail((int) $filter['version']) : $adoption;
+        $current = $selected && $selected->id === $adoption?->id;
+        $closed = $requisition->status !== 'approved' || PurchaseAward::query()->where('requisition_id', $requisition->id)->exists();
+        $open = ! $closed && ! app(ConflictGuard::class)->participationBlocked($request->user(), $requisition);
+        $decisions = AdmissionDecision::query()->where('admission_adoption_id', $selected->id ?? 0)->latest('id')->get();
+        $latestIds = $decisions->unique('quotation_id')->pluck('id');
+        $proposals = collect($opening->proposals($requisition))->map(function ($quote) use ($workflow, $requisition, $decisions) {
+            $basis = $workflow->basis($requisition, $quote['id']);
+
+            return [...$quote, 'basisHash' => $basis['hash'] ?? null, 'clear' => $basis['clear'] ?? false, 'previousId' => $decisions->firstWhere('quotation_id', $quote['id'])->id ?? 0];
+        });
+        $history = AdmissionDecision::query()->where('admission_adoption_id', $selected->id ?? 0)->latest('id')->paginate(15)->withQueryString();
+        $history->through(function ($decision) use ($workflow, $selected, $current, $latestIds, $requisition, $open, $request) {
+            $basis = $workflow->basis($requisition, $decision->quotation_id);
+            $fresh = $current && $latestIds->contains($decision->id) && $basis && $basis['hash'] === $decision->basis_hash;
+
+            return [...$decision->toArray(), 'status' => $workflow->status($decision, $selected), 'current' => (bool) $fresh,
+                'reviews' => AdmissionReview::query()->where('admission_decision_id', $decision->id)->orderBy('id')->get(),
+                'canReview' => $open && $fresh && $workflow->status($decision, $selected) === 'pending' && $workflow->eligible($request->user(), $requisition, $selected, $decision) && ! AdmissionReview::query()->where('admission_decision_id', $decision->id)->where('reviewed_by', $request->user()->id)->exists()];
+        });
+        Inertia::encryptHistory();
+        $response = Inertia::render('purchases/admission', ['requisition' => $requisition->only(['id', 'number']), 'policy' => AdmissionPolicy::query()->latest('revision')->first(), 'adoptions' => AdmissionAdoption::query()->where('requisition_id', $requisition->id)->latest('revision')->get(), 'adoption' => $adoption, 'selected' => $selected, 'proposals' => $proposals, 'history' => $history, 'canAdopt' => $open && $request->user()->purchasing_role === PurchasingRole::Procurement, 'canPropose' => $open && $current && $request->user()->purchasing_role === PurchasingRole::Procurement && $request->user()->id !== $requisition->requester_id, 'closed' => $closed])->toResponse($request);
+        $response->headers->set('Cache-Control', 'private, no-store, max-age=0');
+
+        return $response;
+    }
+
+    public function adopt(Request $request, Requisition $requisition, FormalAdmission $workflow): RedirectResponse
+    {
+        $this->access($request, $requisition->id);
+        $data = $request->validate(['policy_id' => 'required|integer', 'previous_id' => 'required|integer|min:0', 'reason' => 'required|string|min:10|max:4000', 'tenant_id' => 'prohibited', 'snapshot' => 'prohibited', 'created_by' => 'prohibited']);
+        $workflow->adopt($request->user(), $requisition, (int) $data['policy_id'], (int) $data['previous_id'], $data['reason']);
+
+        return to_route('admissions.show', $requisition);
+    }
+
+    public function propose(Request $request, Requisition $requisition, FormalAdmission $workflow): RedirectResponse
+    {
+        $this->access($request, $requisition->id);
+        $data = $request->validate(['quotation_id' => 'required|integer', 'previous_id' => 'required|integer|min:0', 'basis_hash' => 'required|string|size:64', 'outcome' => 'required|in:admit,exclude,clarify', 'reason' => 'required|string|min:10|max:4000', 'tenant_id' => 'prohibited', 'created_by' => 'prohibited', 'snapshot' => 'prohibited', 'status' => 'prohibited']);
+        $workflow->propose($request->user(), $requisition, $data);
+
+        return to_route('admissions.show', $requisition);
+    }
+
+    public function review(Request $request, AdmissionDecision $decision, FormalAdmission $workflow): RedirectResponse
+    {
+        $adoption = AdmissionAdoption::query()->findOrFail($decision->admission_adoption_id);
+        $this->access($request, $adoption->requisition_id);
+        $data = $request->validate(['verdict' => 'required|in:approved,returned', 'reason' => 'required|string|min:10|max:4000', 'reviewed_by' => 'prohibited', 'snapshot' => 'prohibited', 'tenant_id' => 'prohibited']);
+        $workflow->review($request->user(), $decision, $data['verdict'], $data['reason']);
+
+        return to_route('admissions.show', $adoption->requisition_id);
+    }
+}
diff --git a/app/Http/Controllers/PurchaseProcessController.php b/app/Http/Controllers/PurchaseProcessController.php
index b8e7443..3fd8d16 100644
--- a/app/Http/Controllers/PurchaseProcessController.php
+++ b/app/Http/Controllers/PurchaseProcessController.php
@@ -39,6 +39,7 @@ class PurchaseProcessController extends Controller
         $documents = [['label' => $requisition->number, 'kind' => 'Requisição', 'href' => $base]];
         if ($purchases) {
             $documents[] = ['label' => 'Relatório de conferência', 'kind' => 'Relatório de consulta', 'href' => $base.'/relatorio'];
+            $documents[] = ['label' => 'Regime, decisões e conferências', 'kind' => 'Admissão de propostas', 'href' => $base.'/admissao'];
         }
         $qualification = $purchases ? QualificationSet::query()->where('requisition_id', $requisition->id)->latest('revision')->first(['id', 'revision']) : null;
         if ($qualification) {
@@ -111,7 +112,7 @@ class PurchaseProcessController extends Controller
         }
         $actions = ['requisition.created', 'requisition.updated', 'requisition.submitted', 'approval.approved', 'approval.rejected', 'equipment.technical_approved', 'equipment.technical_rejected', 'requisition.revision_created'];
         if ($purchases) {
-            $actions = [...$actions, 'qualification.defined', 'qualification.assessed', 'opening.recorded', 'award.created', 'award.approved', 'award.rejected', 'purchase_order.issued', 'cancellation.requested', 'cancellation.approved', 'cancellation.rejected'];
+            $actions = [...$actions, 'admission.adopted', 'admission.proposed', 'admission.reviewed', 'qualification.defined', 'qualification.assessed', 'opening.recorded', 'award.created', 'award.approved', 'award.rejected', 'purchase_order.issued', 'cancellation.requested', 'cancellation.approved', 'cancellation.rejected'];
         }
         if ($inventory) {
             $actions[] = 'receipt.confirmed';
@@ -126,7 +127,7 @@ class PurchaseProcessController extends Controller
             'stages' => $stages, 'documents' => $documents, 'decisions' => $decisions, 'related' => $related,
             'cancellation' => $cancellation ? ['status' => $cancellation->status, 'href' => '/revisao-compras'] : null,
             'history' => AuditLog::query()->where('requisition_id', $requisition->id)->whereIn('action', $actions)->orderBy('id')->get(['id', 'action', 'created_at']),
-            'future' => ['Decisão formal de admissão ou exclusão', 'Relatório de recomendação em etapas'],
+            'future' => ['Relatório de recomendação em etapas'],
         ])->toResponse($request);
         $response->headers->set('Cache-Control', 'private, no-store, max-age=0');
 
diff --git a/app/Models/AdmissionAdoption.php b/app/Models/AdmissionAdoption.php
new file mode 100644
index 0000000..12f20f5
--- /dev/null
+++ b/app/Models/AdmissionAdoption.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\AppendOnlyInventoryRecord;
+use App\Models\Concerns\BelongsToTenant;
+use Illuminate\Database\Eloquent\Model;
+
+/** @property array{roles:list<string>,required_count:int,policy_revision:int} $snapshot */
+class AdmissionAdoption extends Model
+{
+    use AppendOnlyInventoryRecord, BelongsToTenant;
+
+    public $timestamps = false;
+
+    protected $guarded = ['id'];
+
+    protected function casts(): array
+    {
+        return ['snapshot' => 'array'];
+    }
+}
diff --git a/app/Models/AdmissionDecision.php b/app/Models/AdmissionDecision.php
new file mode 100644
index 0000000..adcaeb8
--- /dev/null
+++ b/app/Models/AdmissionDecision.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\AppendOnlyInventoryRecord;
+use App\Models\Concerns\BelongsToTenant;
+use Illuminate\Database\Eloquent\Model;
+
+/** @property array<string,mixed> $snapshot */
+class AdmissionDecision extends Model
+{
+    use AppendOnlyInventoryRecord, BelongsToTenant;
+
+    public $timestamps = false;
+
+    protected $guarded = ['id'];
+
+    protected function casts(): array
+    {
+        return ['snapshot' => 'array'];
+    }
+}
diff --git a/app/Models/AdmissionPolicy.php b/app/Models/AdmissionPolicy.php
new file mode 100644
index 0000000..4e8c1f6
--- /dev/null
+++ b/app/Models/AdmissionPolicy.php
@@ -0,0 +1,22 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\AppendOnlyInventoryRecord;
+use App\Models\Concerns\BelongsToTenant;
+use Illuminate\Database\Eloquent\Model;
+
+/** @property list<string> $roles */
+class AdmissionPolicy extends Model
+{
+    use AppendOnlyInventoryRecord, BelongsToTenant;
+
+    public $timestamps = false;
+
+    protected $guarded = ['id'];
+
+    protected function casts(): array
+    {
+        return ['roles' => 'array', 'enabled' => 'boolean'];
+    }
+}
diff --git a/app/Models/AdmissionReview.php b/app/Models/AdmissionReview.php
new file mode 100644
index 0000000..af9167e
--- /dev/null
+++ b/app/Models/AdmissionReview.php
@@ -0,0 +1,21 @@
+<?php
+
+namespace App\Models;
+
+use App\Models\Concerns\AppendOnlyInventoryRecord;
+use App\Models\Concerns\BelongsToTenant;
+use Illuminate\Database\Eloquent\Model;
+
+class AdmissionReview extends Model
+{
+    use AppendOnlyInventoryRecord, BelongsToTenant;
+
+    public $timestamps = false;
+
+    protected $guarded = ['id'];
+
+    protected function casts(): array
+    {
+        return ['snapshot' => 'array'];
+    }
+}
diff --git a/app/Models/PurchaseAward.php b/app/Models/PurchaseAward.php
index e797c8c..8d12ebe 100644
--- a/app/Models/PurchaseAward.php
+++ b/app/Models/PurchaseAward.php
@@ -17,6 +17,7 @@ use Illuminate\Database\Eloquent\Relations\HasMany;
  * @property array<string, mixed> $approval_snapshot
  * @property list<array<string, mixed>> $decision_matrix
  * @property array<string,mixed>|null $investment_snapshot
+ * @property array<string,mixed>|null $admission_snapshot
  */
 class PurchaseAward extends Model
 {
@@ -26,7 +27,7 @@ class PurchaseAward extends Model
 
     protected function casts(): array
     {
-        return ['approval_snapshot' => 'array', 'decision_matrix' => 'array', 'investment_snapshot' => 'array', 'delivery_date' => 'date:Y-m-d'];
+        return ['approval_snapshot' => 'array', 'decision_matrix' => 'array', 'investment_snapshot' => 'array', 'admission_snapshot' => 'array', 'delivery_date' => 'date:Y-m-d'];
     }
 
     /** @return HasMany<PurchaseAwardApproval, $this> */
diff --git a/app/Services/ConflictGuard.php b/app/Services/ConflictGuard.php
index b71d144..dc52440 100644
--- a/app/Services/ConflictGuard.php
+++ b/app/Services/ConflictGuard.php
@@ -86,6 +86,7 @@ class ConflictGuard
                 'award.created', 'award.approved', 'award.rejected', 'purchase_order.issued',
                 'opening.recorded',
                 'qualification.defined', 'qualification.assessed',
+                'admission.adopted', 'admission.proposed', 'admission.reviewed',
                 'equipment.technical_approved', 'equipment.technical_rejected',
                 'invoice.created', 'invoice.validated',
                 'payment.registered', 'payment.confirmed', 'payment.rejected',
diff --git a/app/Services/FormalAdmission.php b/app/Services/FormalAdmission.php
new file mode 100644
index 0000000..4240726
--- /dev/null
+++ b/app/Services/FormalAdmission.php
@@ -0,0 +1,247 @@
+<?php
+
+namespace App\Services;
+
+use App\Enums\PurchasingRole;
+use App\Models\AdmissionAdoption;
+use App\Models\AdmissionDecision;
+use App\Models\AdmissionPolicy;
+use App\Models\AdmissionReview;
+use App\Models\PurchaseAward;
+use App\Models\PurchaseOrder;
+use App\Models\QualificationAssessment;
+use App\Models\QualificationSet;
+use App\Models\Quotation;
+use App\Models\QuotationItem;
+use App\Models\Requisition;
+use App\Models\Supplier;
+use App\Models\User;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Validation\ValidationException;
+
+class FormalAdmission
+{
+    private function invalid(string $message): never
+    {
+        throw ValidationException::withMessages(['admission' => $message]);
+    }
+
+    public function adoption(Requisition $request): ?AdmissionAdoption
+    {
+        return AdmissionAdoption::query()->where('requisition_id', $request->id)->latest('revision')->first();
+    }
+
+    private function process(User $actor, int $id): Requisition
+    {
+        $request = Requisition::query()->visibleTo($actor)->lockForUpdate()->findOrFail($id);
+        if ($request->status !== 'approved' || PurchaseAward::query()->where('requisition_id', $id)->exists() || PurchaseOrder::query()->where('requisition_id', $id)->exists()) {
+            $this->invalid('O regime e as decisões só podem ser registados num pedido aprovado, antes da adjudicação.');
+        }
+        app(ConflictGuard::class)->assertParticipation($actor, $request);
+        $quotes = Quotation::query()->where('requisition_id', $id)->orderBy('id')->lockForUpdate()->get(['id', 'supplier_id']);
+        Supplier::query()->whereIn('id', $quotes->pluck('supplier_id'))->orderBy('id')->lockForUpdate()->get();
+        QuotationItem::query()->whereIn('quotation_id', $quotes->pluck('id'))->orderBy('id')->lockForUpdate()->get();
+
+        return $request;
+    }
+
+    /** @param array<string,mixed> $data */
+    public function policy(User $actor, array $data): AdmissionPolicy
+    {
+        if (! is_bool($data['enabled']) || ! is_array($data['roles']) || $data['roles'] === [] || count(array_unique($data['roles'])) !== count($data['roles']) || array_diff($data['roles'], ['finance', 'department_head']) !== [] || filter_var($data['required_count'], FILTER_VALIDATE_INT) === false || $data['required_count'] < 1 || $data['required_count'] > 50 || mb_strlen(trim($data['reason'])) < 10) {
+            $this->invalid('Defina expressamente perfis, quantidade de conferentes e fundamento da política.');
+        }
+
+        return DB::transaction(function () use ($actor, $data) {
+            app(ConflictGuard::class)->lockCompany($actor);
+            $actor = app(CurrentActor::class)->lock($actor, [PurchasingRole::Admin]);
+            $latest = AdmissionPolicy::query()->latest('revision')->first();
+            if ((int) $data['previous_id'] !== ($latest->id ?? 0)) {
+                $this->invalid('A política mudou. Actualize antes de criar outra versão.');
+            }
+            $policy = AdmissionPolicy::query()->create(['tenant_id' => $actor->tenant_id, 'created_by' => $actor->id, 'revision' => ($latest->revision ?? 0) + 1, 'enabled' => $data['enabled'], 'roles' => array_values($data['roles']), 'required_count' => $data['required_count'], 'reason' => $data['reason'], 'created_at' => now()]);
+            app(RequisitionWorkflow::class)->audit($actor, 'admission.policy', null, null, $policy->toArray());
+
+            return $policy;
+        });
+    }
+
+    public function adopt(User $actor, Requisition $request, int $policyId, int $previousId, string $reason): AdmissionAdoption
+    {
+        return DB::transaction(function () use ($actor, $request, $policyId, $previousId, $reason) {
+            app(ConflictGuard::class)->lockCompany($actor);
+            $actor = app(CurrentActor::class)->lock($actor, [PurchasingRole::Procurement]);
+            $request = $this->process($actor, $request->id);
+            $previous = $this->adoption($request);
+            $policy = AdmissionPolicy::query()->latest('revision')->first();
+            if (! $policy || ! $policy->enabled || $policy->id !== $policyId || ($previous->id ?? 0) !== $previousId) {
+                $this->invalid('Seleccione a política activa e a adopção actual. Não se altera um regime implicitamente.');
+            }
+            if ($previous?->admission_policy_id === $policy->id || mb_strlen(trim($reason)) < 10) {
+                $this->invalid('A adopção exige outra versão de política e fundamento próprio.');
+            }
+            $adoption = AdmissionAdoption::query()->create(['tenant_id' => $actor->tenant_id, 'requisition_id' => $request->id, 'admission_policy_id' => $policy->id, 'created_by' => $actor->id, 'revision' => ($previous->revision ?? 0) + 1, 'snapshot' => ['roles' => $policy->roles, 'required_count' => $policy->required_count, 'policy_revision' => $policy->revision], 'reason' => $reason, 'created_at' => now()]);
+            app(RequisitionWorkflow::class)->audit($actor, 'admission.adopted', $request, null, ['adoption' => $adoption->toArray(), 'previous_id' => $previous?->id]);
+
+            return $adoption;
+        });
+    }
+
+    /** @return array{set_id:int,payload:array<string,mixed>,hash:string,clear:bool}|null */
+    public function basis(Requisition $request, int $quoteId): ?array
+    {
+        $set = QualificationSet::query()->where('requisition_id', $request->id)->latest('revision')->first();
+        if (! $set) {
+            return null;
+        }
+        $opening = app(ProposalOpeningWorkflow::class);
+        $quotes = $opening->proposals($request);
+        if ($set->basis_hash !== $opening->basis($quotes)) {
+            return null;
+        }
+        $quote = collect($quotes)->firstWhere('id', $quoteId);
+        if (! $quote) {
+            return null;
+        }
+        $ids = QualificationAssessment::query()->where('qualification_set_id', $set->id)->where('quotation_id', $quoteId)->selectRaw('MAX(id)')->groupBy('analyst_id');
+        $records = QualificationAssessment::query()->whereIn('id', $ids)->orderBy('analyst_id')->get();
+        $clear = $records->isNotEmpty();
+        foreach ($set->criteria as $criterion) {
+            $results = [];
+            foreach ($records as $record) {
+                $answer = collect($record->answers)->firstWhere('criterion_id', $criterion['id']);
+                if (! $answer || ! in_array($answer['result'], ['met', 'not_met', 'not_applicable'], true) || ($criterion['required'] && $answer['result'] !== 'met')) {
+                    $clear = false;
+                }
+                if ($answer) {
+                    $results[] = $answer['result'];
+                }
+            }
+            if (count(array_unique($results)) !== 1) {
+                $clear = false;
+            }
+        }
+        $payload = ['set_id' => $set->id, 'criteria' => $set->criteria, 'quotes_hash' => $set->basis_hash, 'quote' => $quote, 'analyses' => $records->map(fn ($record) => $record->only(['id', 'analyst_id', 'revision', 'answers', 'snapshot']))->all()];
+
+        return ['set_id' => $set->id, 'payload' => $payload, 'hash' => hash('sha256', json_encode($payload, JSON_THROW_ON_ERROR)), 'clear' => $clear];
+    }
+
+    public function status(AdmissionDecision $decision, AdmissionAdoption $adoption): string
+    {
+        $reviews = AdmissionReview::query()->where('admission_decision_id', $decision->id)->get();
+        if ($reviews->contains('verdict', 'returned')) {
+            return 'returned';
+        }
+
+        return $reviews->where('verdict', 'approved')->count() >= $adoption->snapshot['required_count'] ? 'confirmed' : 'pending';
+    }
+
+    /** @param array<string,mixed> $data */
+    public function propose(User $actor, Requisition $request, array $data): AdmissionDecision
+    {
+        if (! in_array($data['outcome'], ['admit', 'exclude', 'clarify'], true) || mb_strlen(trim($data['reason'])) < 10) {
+            $this->invalid('Seleccione uma decisão e fundamente a tentativa.');
+        }
+
+        return DB::transaction(function () use ($actor, $request, $data) {
+            app(ConflictGuard::class)->lockCompany($actor);
+            $actor = app(CurrentActor::class)->lock($actor, [PurchasingRole::Procurement]);
+            $request = $this->process($actor, $request->id);
+            abort_if($actor->id === $request->requester_id, 403);
+            $adoption = $this->adoption($request);
+            if (! $adoption) {
+                $this->invalid('O processo ainda não adoptou expressamente o regime.');
+            }
+            $quote = Quotation::query()->where('requisition_id', $request->id)->whereKey($data['quotation_id'])->firstOrFail();
+            app(ConflictGuard::class)->assertProcess($request, $quote->supplier_id, $actor);
+            $basis = $this->basis($request, $quote->id);
+            if (! $basis || $basis['hash'] !== $data['basis_hash']) {
+                $this->invalid('Confira requisitos e análises actuais antes de propor uma decisão.');
+            }
+            if ($data['outcome'] === 'admit' && ! $basis['clear']) {
+                $this->invalid('A admissão exige análise sem pendências, divergências ou requisitos obrigatórios não resolvidos.');
+            }
+            $previous = AdmissionDecision::query()->where('admission_adoption_id', $adoption->id)->where('quotation_id', $quote->id)->latest('revision')->first();
+            if ((int) $data['previous_id'] !== ($previous->id ?? 0)) {
+                $this->invalid('A tentativa mudou. Actualize a página para preservar o antecedente correcto.');
+            }
+            $decision = AdmissionDecision::query()->create(['tenant_id' => $actor->tenant_id, 'admission_adoption_id' => $adoption->id, 'qualification_set_id' => $basis['set_id'], 'quotation_id' => $quote->id, 'created_by' => $actor->id, 'revision' => ($previous->revision ?? 0) + 1, 'outcome' => $data['outcome'], 'basis_hash' => $basis['hash'], 'snapshot' => ['basis' => $basis['payload'], 'proponent' => $actor->only(['id', 'name'])], 'reason' => $data['reason'], 'created_at' => now()]);
+            app(RequisitionWorkflow::class)->audit($actor, 'admission.proposed', $request, null, ['decision' => $decision->toArray(), 'previous_id' => $previous?->id]);
+
+            return $decision;
+        });
+    }
+
+    public function eligible(User $actor, Requisition $request, AdmissionAdoption $adoption, AdmissionDecision $decision): bool
+    {
+        return $actor->tenant_id === $request->tenant_id && in_array($actor->purchasing_role->value, $adoption->snapshot['roles'], true) && ! in_array($actor->id, [$request->requester_id, $decision->created_by], true) && ($actor->purchasing_role !== PurchasingRole::DepartmentHead || $actor->department_id === $request->department_id);
+    }
+
+    public function review(User $actor, AdmissionDecision $decision, string $verdict, string $reason): void
+    {
+        if (! in_array($verdict, ['approved', 'returned'], true) || mb_strlen(trim($reason)) < 10) {
+            $this->invalid('Seleccione uma conferência válida e fundamente-a.');
+        }
+        DB::transaction(function () use ($actor, $decision, $verdict, $reason) {
+            app(ConflictGuard::class)->lockCompany($actor);
+            $actor = app(CurrentActor::class)->lock($actor, [PurchasingRole::Finance, PurchasingRole::DepartmentHead]);
+            $original = AdmissionAdoption::query()->findOrFail($decision->admission_adoption_id);
+            $request = $this->process($actor, $original->requisition_id);
+            $adoption = $this->adoption($request);
+            abort_unless($adoption && $this->eligible($actor, $request, $adoption, $decision), 403);
+            $latest = AdmissionDecision::query()->where('admission_adoption_id', $adoption->id)->where('quotation_id', $decision->quotation_id)->latest('revision')->first();
+            $basis = $this->basis($request, $decision->quotation_id);
+            if ($decision->admission_adoption_id !== $adoption->id || $latest?->id !== $decision->id || ! $basis || $basis['hash'] !== $decision->basis_hash) {
+                $this->invalid('A política do processo, tentativa ou base mudou. Registe outra tentativa e novas conferências.');
+            }
+            $existing = AdmissionReview::query()->where('admission_decision_id', $decision->id)->where('reviewed_by', $actor->id)->first();
+            if ($existing) {
+                if ($existing->verdict !== $verdict || $existing->reason !== $reason) {
+                    $this->invalid('A conferência anterior é imutável.');
+                }
+
+                return;
+            }
+            if ($this->status($decision, $adoption) !== 'pending') {
+                $this->invalid('Esta tentativa já foi concluída ou devolvida.');
+            }
+            if ($verdict === 'approved') {
+                foreach (AdmissionReview::query()->where('admission_decision_id', $decision->id)->where('verdict', 'approved')->get() as $review) {
+                    $reviewer = User::query()->where('tenant_id', $actor->tenant_id)->lockForUpdate()->find($review->reviewed_by);
+                    if (! $reviewer || ! $this->eligible($reviewer, $request, $adoption, $decision)) {
+                        $this->invalid('Um conferente anterior deixou de ser elegível antes da conclusão. Devolva e prepare outra tentativa.');
+                    }
+                }
+            }
+            $review = AdmissionReview::query()->create(['tenant_id' => $actor->tenant_id, 'admission_decision_id' => $decision->id, 'reviewed_by' => $actor->id, 'verdict' => $verdict, 'reason' => $reason, 'snapshot' => $actor->only(['id', 'name', 'purchasing_role', 'department_id']), 'created_at' => now()]);
+            app(RequisitionWorkflow::class)->audit($actor, 'admission.reviewed', $request, null, $review->toArray());
+        });
+    }
+
+    /** @return array<string,mixed>|null */
+    public function selection(Requisition $request, int $quoteId): ?array
+    {
+        $adoption = $this->adoption($request);
+        if (! $adoption) {
+            return null;
+        }
+        $decision = AdmissionDecision::query()->where('admission_adoption_id', $adoption->id)->where('quotation_id', $quoteId)->latest('revision')->first();
+        $basis = $this->basis($request, $quoteId);
+        if (! $decision || $decision->outcome !== 'admit' || ! $basis || ! $basis['clear'] || $basis['hash'] !== $decision->basis_hash || $this->status($decision, $adoption) !== 'confirmed') {
+            $this->invalid('A proposta exige admissão confirmada na base actual do regime adoptado.');
+        }
+
+        return ['adoption_id' => $adoption->id, 'policy_id' => $adoption->admission_policy_id, 'decision_id' => $decision->id, 'qualification_set_id' => $decision->qualification_set_id, 'basis_hash' => $decision->basis_hash, 'review_ids' => AdmissionReview::query()->where('admission_decision_id', $decision->id)->orderBy('id')->pluck('id')->all()];
+    }
+
+    public function admitted(Requisition $request, int $quoteId): bool
+    {
+        try {
+            $this->selection($request, $quoteId);
+
+            return true;
+        } catch (ValidationException) {
+            return false;
+        }
+    }
+}
diff --git a/app/Services/ProcurementReviewReport.php b/app/Services/ProcurementReviewReport.php
index e6b2e7c..8b615fd 100644
--- a/app/Services/ProcurementReviewReport.php
+++ b/app/Services/ProcurementReviewReport.php
@@ -66,6 +66,7 @@ class ProcurementReviewReport
                 'requisition' => [...$request->only(['id', 'number', 'status', 'justification']), 'department' => $request->department?->name, 'requester' => $request->requester?->name],
                 'comparison' => ['ready' => $comparison['ready'], 'top_count' => $comparison['ready'] ? count($comparison['top_ids']) : 0, 'rows' => $rows],
                 'qualification' => $qualification,
+                'admission' => app(FormalAdmission::class)->adoption($request)?->only(['id', 'revision', 'snapshot', 'reason']),
                 'opening' => $opening ? [...$opening->only(['id', 'revision', 'reference']), 'source_changed' => $opening->basis_hash !== $basis] : null,
                 'award' => $award?->only(['id', 'status', 'total_minor']),
                 'order' => $order?->only(['id', 'number', 'currency', 'total_minor']),
diff --git a/app/Services/ProposalComparison.php b/app/Services/ProposalComparison.php
index 7253444..1278305 100644
--- a/app/Services/ProposalComparison.php
+++ b/app/Services/ProposalComparison.php
@@ -21,9 +21,13 @@ class ProposalComparison
             ->with(['supplier', 'items' => fn ($q) => $q->orderBy('id'), 'evaluations' => fn ($q) => $q->orderBy('id')])->orderBy('id')->get();
         $guard = app(ConflictGuard::class);
         $referenceWeights = $quotes->first()?->weights;
+        $adopted = app(FormalAdmission::class)->adoption($requisition) !== null;
         $rows = [];
         foreach ($quotes as $quote) {
             $reasons = [];
+            if ($adopted && ! app(FormalAdmission::class)->admitted($requisition, $quote->id)) {
+                $reasons[] = 'O regime adoptado exige admissão confirmada na base actual.';
+            }
             if (! $quote->supplier?->eligible() || $quote->valid_until < today()) {
                 $reasons[] = 'Fornecedor não elegível ou proposta expirada.';
             }
diff --git a/app/Services/PurchaseWorkflow.php b/app/Services/PurchaseWorkflow.php
index d691141..ec96e31 100644
--- a/app/Services/PurchaseWorkflow.php
+++ b/app/Services/PurchaseWorkflow.php
@@ -38,6 +38,7 @@ class PurchaseWorkflow
             $this->sourceApproved($requisition, $rules);
             $quote = Quotation::query()->where('requisition_id', $requisition->id)->lockForUpdate()->findOrFail($data['quotation_id']);
             $result = $this->checkComparison($user, $requisition, $quote);
+            $admission = app(FormalAdmission::class)->selection($requisition, $quote->id);
             $investment = app(InvestmentWorkflow::class)->check($requisition, $quote);
             app(BudgetWorkflow::class)->record($user, $requisition, 'award', $quote->total_minor, $quote->subtotal_minor);
             $award = PurchaseAward::query()->create([
@@ -47,6 +48,7 @@ class PurchaseWorkflow
                 'subtotal_minor' => $quote->subtotal_minor, 'tax_minor' => $quote->tax_minor, 'total_minor' => $quote->total_minor,
                 'approval_snapshot' => $rules, 'decision_matrix' => $result['rows'], 'comparison_hash' => $result['fingerprint'],
                 'investment_snapshot' => $investment,
+                'admission_snapshot' => $admission,
             ]);
             $roles = $this->roles($rules, $rules['approval_includes_tax'] ? $quote->total_minor : $quote->subtotal_minor, $requisition->items()->where('purchase_type', 'equipment')->exists());
             foreach ($roles as $position => $role) {
@@ -149,6 +151,7 @@ class PurchaseWorkflow
                 'quotation' => [...$quote->only(['id', 'reference', 'currency', 'payment_terms', 'delivery_days']), 'valid_until' => $validUntil],
                 'award' => [...$award->only(['id', 'justification', 'delivery_location']), 'delivery_date' => $deliveryDate],
                 'issuer' => $user->only(['id', 'name']), 'approval_rules' => $award->approval_snapshot,
+                'admission' => $award->admission_snapshot,
                 'estimate_approvals' => $requisition->steps()->get()->toArray(),
                 'final_approvals' => $award->approvals()->get()->toArray(),
                 'decision_matrix' => $this->comparison->inspect($requisition)['rows'], 'items' => $lines,
@@ -180,6 +183,9 @@ class PurchaseWorkflow
             throw ValidationException::withMessages(['investment' => 'A regra de investimento ou a base técnica/orçamental mudou. As aprovações anteriores não autorizam uma emissão com outra base.']);
         }
         $result = $this->checkComparison($user, $requisition, $quote);
+        if (app(FormalAdmission::class)->selection($requisition, $quote->id) !== $award->admission_snapshot) {
+            throw ValidationException::withMessages(['admission' => 'A base de admissão já não corresponde à adjudicação. Não se emite com outra base.']);
+        }
         if ($result['fingerprint'] !== $award->comparison_hash || $award->approval_snapshot !== $rules ||
             $quote->subtotal_minor !== $award->subtotal_minor || $quote->tax_minor !== $award->tax_minor || $quote->total_minor !== $award->total_minor) {
             throw ValidationException::withMessages(['comparison' => 'A base da adjudicação mudou. As aprovações anteriores não autorizam a emissão com dados diferentes.']);
diff --git a/database/migrations/2026_10_28_000019_create_formal_admission.php b/database/migrations/2026_10_28_000019_create_formal_admission.php
new file mode 100644
index 0000000..eeee3cc
--- /dev/null
+++ b/database/migrations/2026_10_28_000019_create_formal_admission.php
@@ -0,0 +1,68 @@
+<?php
+
+use Illuminate\Database\Migrations\Migration;
+use Illuminate\Database\Schema\Blueprint;
+use Illuminate\Support\Facades\Schema;
+
+return new class extends Migration
+{
+    public function up(): void
+    {
+        Schema::create('admission_policies', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
+            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
+            $table->unsignedInteger('revision');
+            $table->boolean('enabled');
+            $table->json('roles');
+            $table->unsignedInteger('required_count');
+            $table->text('reason');
+            $table->timestamp('created_at');
+            $table->unique(['tenant_id', 'revision']);
+        });
+        Schema::create('admission_adoptions', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
+            $table->foreignId('requisition_id')->constrained()->restrictOnDelete();
+            $table->foreignId('admission_policy_id')->constrained()->restrictOnDelete();
+            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
+            $table->unsignedInteger('revision');
+            $table->json('snapshot');
+            $table->text('reason');
+            $table->timestamp('created_at');
+            $table->unique(['requisition_id', 'revision']);
+        });
+        Schema::create('admission_decisions', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
+            $table->foreignId('admission_adoption_id')->constrained()->restrictOnDelete();
+            $table->foreignId('qualification_set_id')->constrained()->restrictOnDelete();
+            $table->foreignId('quotation_id')->constrained()->restrictOnDelete();
+            $table->foreignId('created_by')->constrained('users')->restrictOnDelete();
+            $table->unsignedInteger('revision');
+            $table->string('outcome');
+            $table->string('basis_hash', 64);
+            $table->json('snapshot');
+            $table->text('reason');
+            $table->timestamp('created_at');
+            $table->unique(['admission_adoption_id', 'quotation_id', 'revision'], 'admission_decision_version_unique');
+        });
+        Schema::create('admission_reviews', function (Blueprint $table) {
+            $table->id();
+            $table->foreignId('tenant_id')->constrained()->restrictOnDelete();
+            $table->foreignId('admission_decision_id')->constrained()->restrictOnDelete();
+            $table->foreignId('reviewed_by')->constrained('users')->restrictOnDelete();
+            $table->string('verdict');
+            $table->text('reason');
+            $table->json('snapshot');
+            $table->timestamp('created_at');
+            $table->unique(['admission_decision_id', 'reviewed_by']);
+        });
+        Schema::table('purchase_awards', fn (Blueprint $table) => $table->json('admission_snapshot')->nullable());
+    }
+
+    public function down(): void
+    {
+        throw new LogicException('Preservar políticas, adopções, decisões e conferências de admissão.');
+    }
+};
diff --git a/docs/admissao-concorrencia-postgresql.json b/docs/admissao-concorrencia-postgresql.json
new file mode 100644
index 0000000..1508d51
--- /dev/null
+++ b/docs/admissao-concorrencia-postgresql.json
@@ -0,0 +1,51 @@
+{
+    "tested_at_utc": "2026-10-28T18:21:31+00:00",
+    "separate_database": true,
+    "transport": "Independent PHP service transactions and PostgreSQL connections",
+    "scenarios": [
+        {
+            "name": "same_person",
+            "passed": true,
+            "overlapping_lock_waits": 2,
+            "reviews": 1,
+            "state": "pending"
+        },
+        {
+            "name": "distinct_people",
+            "passed": true,
+            "overlapping_lock_waits": 2,
+            "reviews": 2,
+            "state": "confirmed"
+        },
+        {
+            "name": "opposing_reviews",
+            "passed": true,
+            "overlapping_lock_waits": 2,
+            "reviews": 1,
+            "state": "pending"
+        },
+        {
+            "name": "revoked_role",
+            "passed": true,
+            "overlapping_lock_waits": 2,
+            "reviews": 0,
+            "state": "pending"
+        },
+        {
+            "name": "changed_basis",
+            "passed": true,
+            "overlapping_lock_waits": 2,
+            "reviews": 0,
+            "state": "pending"
+        },
+        {
+            "name": "new_adoption",
+            "passed": true,
+            "overlapping_lock_waits": 2,
+            "reviews": 0,
+            "state": "pending"
+        }
+    ],
+    "passed": true,
+    "test_database_dropped": true
+}
diff --git a/docs/admissao-migracao-000019.json b/docs/admissao-migracao-000019.json
new file mode 100644
index 0000000..dcd006a
--- /dev/null
+++ b/docs/admissao-migracao-000019.json
@@ -0,0 +1,16 @@
+{
+    "verified_at_utc": "2026-10-28T18:23:41+00:00",
+    "migration": "2026_10_28_000019_create_formal_admission",
+    "batch": 20,
+    "backup_created": true,
+    "backup_bytes": 306342,
+    "restore_verified": true,
+    "restored_tables": 57,
+    "restore_database_dropped": true,
+    "business_records_unchanged": true,
+    "existing_constraints_preserved": true,
+    "env_unchanged": true,
+    "admission_policies_count": 0,
+    "admission_adoptions_count": 0,
+    "operational_validation": false
+}
diff --git a/docs/proposta-admissao-exclusao.md b/docs/proposta-admissao-exclusao.md
index 010fec5..432565f 100644
--- a/docs/proposta-admissao-exclusao.md
+++ b/docs/proposta-admissao-exclusao.md
@@ -1,10 +1,10 @@
 # Proposta de âmbito para admissão e exclusão de propostas
 
-Estado: proposta para validação. Não implementa decisões formais na base de
-negócio e não activa regras de exclusão ou adjudicação. Data: 28 de Outubro
-de 2026.
+Estado: âmbito validado pelo utilizador e implementado em 28 de Outubro de 2026. O circuito real é opcional por empresa e por processo; nenhuma política
+real foi criada ou activada durante esta entrega. A demonstração pública
+continua separada dos registos autenticados.
 
-## Resultado preparado para revisão
+## Demonstração preparada antes da validação
 
 `/proposta/admissao` demonstra configuração de conferentes e quantidade de
 confirmações, proposta manual por Compras, conferência fundamentada por
@@ -18,7 +18,7 @@ um quórum imposto às empresas. Nenhum valor financeiro dos exemplos locais
 é utilizado. Os casos A/B/C são exemplos de análise sem pendências, requisito
 obrigatório não cumprido e pendência/divergência, respectivamente.
 
-## Primeiro circuito proposto
+## Circuito inicial validado
 
 1. Administração da empresa configura e activa expressamente uma política
    versionada: perfis de conferência e quantidade de pessoas distintas exigida.
@@ -57,8 +57,11 @@ obrigatório não cumprido e pendência/divergência, respectivamente.
    aplicável podem entrar na selecção de adjudicação. Uma exclusão ou pedido
    de esclarecimento não substitui admissão. Admissão não autoriza compra:
    mantêm-se pontuação, conflitos, orçamento e aprovação do valor final.
-   A implementação deverá guardar a base de admissão na adjudicação e
-   verificar coerência antes da emissão. Não se alteram ordens já emitidas.
+   A implementação guarda a base de admissão na adjudicação e na ordem e
+   verifica coerência antes da emissão. Não se alteram ordens já emitidas.
+   Mantêm-se o mínimo existente de três fornecedores elegíveis e duas
+   avaliações por proposta. Neste regime, os três fornecedores precisam
+   também de propostas admitidas; não se implementou uma dispensa do mínimo.
 
 Estas são escolhas propostas para o primeiro circuito suportado, não normas
 legais ou obrigações universais deduzidas dos modelos históricos. Cada empresa
@@ -76,28 +79,35 @@ validação solicitada é do âmbito do produto; não publica políticas reais.
   decisão de admissão/exclusão.
 - Cancelamento de ordens, devoluções, estornos ou reversões financeiras.
 
-## Verificações previstas para a implementação
+## Verificações da implementação
 
 Identidade e segregação no servidor; política/base preservadas; requisitos
 pendentes ou obrigatórios não resolvidos; conferências repetidas; devolução;
 perfil/departamento revogado; empresas diferentes; tentativas desactualizadas;
 admissão versus adjudicação/emissão; rollback de auditoria e concorrência
-PostgreSQL. A demonstração não substitui estes testes da futura implementação.
+PostgreSQL. Os resultados efectivos estão em `docs/validacao-tecnica.md`;
+a demonstração não substitui os testes da implementação autenticada.
 
-## Decisão solicitada
+## Validação recebida e activação
 
-Validar o circuito inicial: **decisão manual por Compras, confirmações
+O utilizador validou o circuito inicial: **decisão manual por Compras, confirmações
 independentes em quantidade/perfis definidos pela empresa e integração na
 adjudicação apenas por adopção explícita do regime**, sem admitir propostas
 com pendências ou requisitos obrigatórios não resolvidos neste primeiro âmbito.
 
-Pausa-se a implementação com dados reais para esta validação, conforme a
-orientação de continuidade: «definir com a empresa o próximo âmbito pendente
-antes de o implementar», em `docs/orientacoes-continuidade.md`. A autorização
-anterior da qualificação era documental e não activava admissão/exclusão.
+Esta validação autoriza a implementação do produto, sem publicar uma política
+por conta das aderentes. A Administração configura `/politica-admissao` com
+quantidade e perfis expressos. Compras adopta essa versão em
+`/requisicoes/{requisition}/admissao` antes de adjudicar. Sem adopção, mantém-se
+o circuito anterior. A desactivação geral impede novas adopções, preservando
+as versões já adoptadas. Uma nova tentativa substitui a anterior para efeitos
+de elegibilidade, sem apagar o histórico. O limite de 50 confirmações no
+formulário é técnico, não um quórum empresarial; assegurar pessoas elegíveis
+em número suficiente é responsabilidade da configuração da empresa.
+
 As alterações locais dos três documentos de continuidade foram preservadas.
 
-## Verificações da preparação
+## Histórico: verificações da preparação da demonstração
 
 TypeScript, build, Pint e lint/formatação dos ficheiros desta proposta
 passaram. Os três testes existentes de consulta pública passaram, com 39
diff --git a/docs/validacao-tecnica.md b/docs/validacao-tecnica.md
index 89d1088..d8ecfdd 100644
--- a/docs/validacao-tecnica.md
+++ b/docs/validacao-tecnica.md
@@ -1,5 +1,93 @@
 # Validação técnica do SGC — 28 de Outubro de 2026
 
+## Incremento: admissão e exclusão por adopção expressa
+
+O utilizador validou `docs/proposta-admissao-exclusao.md`. A Administração da
+empresa pode registar versões da política em `/politica-admissao`, indicando
+expressamente perfis de conferência (Finanças e/ou chefia do departamento),
+quantidade de pessoas distintas e fundamento. Não há quantidade nem perfis
+pré-seleccionados. O máximo de 50 no formulário é um limite técnico, não uma
+regra empresarial. A disponibilidade de pessoas elegíveis deve acompanhar a
+configuração da empresa.
+
+Compras adopta a política activa em `/requisicoes/{requisition}/admissao`,
+num pedido aprovado e antes de adjudicar. Sem adopção, mantém-se o circuito
+existente. A política adoptada fica preservada; desactivar a política geral
+impede novas adopções e não reescreve processos existentes. Aplicar outra
+versão exige nova adopção expressa e novas decisões/conferências. Não há
+regresso implícito ao circuito sem admissão.
+
+Compras propõe admitir, excluir ou pedir esclarecimento interno por proposta,
+com fundamento e base preservada de requisitos, propostas e últimas análises
+de cada analista. O proponente não pode ser o solicitante. Admitir exige
+análise existente sem pendências, respostas em falta ou divergências e com
+todos os requisitos obrigatórios cumpridos. Um requisito facultativo
+uniformemente não cumprido ou não aplicável não constitui, por si, uma
+dispensa de requisito obrigatório.
+
+Os conferentes são pessoas distintas, da mesma empresa, com perfil e
+departamento ainda elegíveis, diferentes do solicitante e do proponente,
+sem conflito de interesses. Uma conferência repetida com conteúdo idêntico
+é idempotente e conta uma vez; outra resposta não reescreve a assinatura.
+Uma devolução termina a tentativa sem excluir automaticamente o concorrente.
+Corrigir cria nova tentativa, sem copiar confirmações. Antes de concluir o
+quórum, as confirmações anteriores são revalidadas; uma decisão concluída
+conserva a elegibilidade verificada na sua data. Uma alteração de base,
+tentativa ou adopção invalida a utilização de conferências antigas.
+
+A comparação usa o cálculo ponderado existente. Nos processos que adoptaram
+o regime, só propostas com admissão confirmada e actual são elegíveis.
+Mantêm-se os mínimos existentes de três fornecedores elegíveis e duas
+avaliações por proposta, sem dispensas novas. A base da admissão fica na
+adjudicação e na ordem; é revalidada antes de aprovar/emitir. Não se aplicam
+regras retroactivas a adjudicações/ordens existentes nem se reemitem ordens
+já emitidas. A admissão, sozinha, não movimenta orçamento, facturas ou
+pagamentos. O relatório de conferência identifica o regime adoptado; o
+processo completo liga às decisões e apresenta os eventos de auditoria.
+
+As novas páginas usam o cabeçalho, rodapé e navegação partilhados. O título
+HTML inicial foi corrigido de `ProcuraFlow` para **Sistema de Gestão de
+Compras (SGC)**, sem modificar `.env`. O nome visível das novas páginas
+segue a mesma identificação.
+
+Migração `000019`, lote **20**, aplicada em `compras_dev` após backup privado
+de **306342 bytes**, verificado por restauro numa base separada e eliminada
+após a conferência. Foram verificadas **57 tabelas anteriores**, registos de
+negócio por projecção das colunas originais, restrições existentes, histórico
+de migrações e integridade de `.env`. A migração acrescenta quatro tabelas e
+um campo JSON anulável na adjudicação. As quatro tabelas reais estão vazias;
+nenhuma política foi publicada por conta das aderentes. O relatório sanitizado
+está em `docs/admissao-migracao-000019.json`; o backup/manifesto permanecem
+privados, fora do Git. O rollback automático destrutivo está impedido.
+
+Os seis cenários em `docs/admissao-concorrencia-postgresql.json` passaram
+com ligações/processos PHP independentes e dois bloqueios simultâneos
+observados no PostgreSQL: mesma pessoa, pessoas distintas, respostas
+opostas, perfil revogado, base alterada e nova adopção durante a espera.
+Conferências, quórum e auditoria foram conferidos; a base de teste foi
+eliminada. Não se apresenta esta bateria como um teste de corrida de emissão.
+
+Resultado final do servidor: **478 testes aprovados, 2 ignorados e 3887
+asserções**. A bateria inclui os 13 cenários novos de admissão e quatro de
+integração real com adjudicação/emissão: base preservada na ordem,
+pontuações mantidas, exclusão e mínimo de fornecedores, alterações antes da
+emissão, repetição de emissão e adjudicação anterior sem adopção retroactiva.
+Os 94 testes dos módulos directamente relacionados também passaram após a
+integração do histórico e do campo preservado na ordem. PHPStan e Pint
+passaram. TypeScript, build e lint/formatação dos ficheiros deste âmbito
+passaram; a verificação global continua limitada pela formatação alheia
+indicada abaixo. HTTP 200 confirmado para início, demonstração de admissão
+e login, todos com o título inicial Sistema de Gestão de Compras (SGC).
+
+O navegador continua a devolver `The browser access host is unavailable`.
+Permanecem pendentes a revisão visual pública, autenticada e de impressão e
+as interacções no navegador. As verificações HTTP e automatizadas não a
+substituem. Recomendação formal em etapas, excepções/dispensas, comunicação
+externa e cancelamento de ordens emitidas ficam fora desta entrega.
+Os três documentos locais de continuidade foram preservados sem os incluir
+no commit. A formatação global de `docs/compatibilidade.md`, alteração alheia,
+continua pendente; a verificação de âmbito exclui esse ficheiro.
+
 ## Incremento: relatório de conferência e impressão
 
 As propostas e a visão única do processo incluem o acesso a
diff --git a/resources/js/components/sgc-shell.tsx b/resources/js/components/sgc-shell.tsx
index 1448460..d2a3ccd 100644
--- a/resources/js/components/sgc-shell.tsx
+++ b/resources/js/components/sgc-shell.tsx
@@ -82,6 +82,12 @@ const groups: { label: string; entries: Entry[] }[] = [
                 demo: '/consulta/investimento',
                 roles: ['admin', 'finance', 'procurement'],
             },
+            {
+                label: 'Política de admissão',
+                path: '/politica-admissao',
+                demo: '/proposta/admissao',
+                roles: ['admin'],
+            },
         ],
     },
     {
diff --git a/resources/js/pages/purchases/admission-policy.tsx b/resources/js/pages/purchases/admission-policy.tsx
new file mode 100644
index 0000000..6e70310
--- /dev/null
+++ b/resources/js/pages/purchases/admission-policy.tsx
@@ -0,0 +1,186 @@
+import { Head, Link, useForm } from '@inertiajs/react';
+import { FormErrors, PageTitle, Panel } from '@/components/procurement';
+import { Button } from '@/components/ui/button';
+import { Input } from '@/components/ui/input';
+import { Label } from '@/components/ui/label';
+import { date, roleLabels } from '@/types/procurement';
+
+type Policy = {
+    id: number;
+    revision: number;
+    enabled: boolean;
+    roles: string[];
+    required_count: number;
+    reason: string;
+    created_at: string;
+};
+type Props = {
+    latest: Policy | null;
+    policies: {
+        data: Policy[];
+        prev_page_url: string | null;
+        next_page_url: string | null;
+    };
+};
+export default function AdmissionPolicy({ latest, policies }: Props) {
+    return (
+        <PolicyForm key={latest?.id ?? 0} latest={latest} policies={policies} />
+    );
+}
+
+function PolicyForm({ latest, policies }: Props) {
+    const form = useForm({
+        previous_id: latest?.id ?? 0,
+        enabled: false,
+        roles: [] as string[],
+        required_count: '',
+        reason: '',
+    });
+    return (
+        <>
+            <Head title="Política de admissão" />
+            <div className="mx-auto flex max-w-7xl flex-col gap-6 p-5 lg:p-8">
+                <PageTitle
+                    eyebrow="Configuração da empresa"
+                    title="Política de admissão"
+                    description="Sistema de Gestão de Compras (SGC) · Configuração da empresa"
+                />
+                <Panel title="Nova versão da política">
+                    <p className="mb-4 text-sm text-muted-foreground">
+                        Defina os perfis e a quantidade de pessoas distintas.
+                        Activar permite novas adopções expressas pelos
+                        processos; desactivar impede novas adopções. As versões
+                        já adoptadas mantêm-se. O limite técnico de 50
+                        confirmações não define uma regra da empresa.
+                    </p>
+                    <form
+                        className="space-y-4"
+                        onSubmit={(e) => {
+                            e.preventDefault();
+                            form.post('/politica-admissao');
+                        }}
+                    >
+                        <FormErrors errors={form.errors} />
+                        <Label className="flex items-center gap-2">
+                            <input
+                                type="checkbox"
+                                checked={form.data.enabled}
+                                onChange={(e) =>
+                                    form.setData('enabled', e.target.checked)
+                                }
+                            />
+                            Activar para novas adopções
+                        </Label>
+                        <fieldset className="space-y-2">
+                            <legend className="mb-2 text-sm font-medium">
+                                Perfis autorizados a conferir
+                            </legend>
+                            {['finance', 'department_head'].map((role) => (
+                                <Label
+                                    key={role}
+                                    className="flex items-center gap-2"
+                                >
+                                    <input
+                                        type="checkbox"
+                                        checked={form.data.roles.includes(role)}
+                                        onChange={(e) =>
+                                            form.setData(
+                                                'roles',
+                                                e.target.checked
+                                                    ? [...form.data.roles, role]
+                                                    : form.data.roles.filter(
+                                                          (r) => r !== role,
+                                                      ),
+                                            )
+                                        }
+                                    />
+                                    {roleLabels[role] ?? role}
+                                    {role === 'department_head' &&
+                                        ' do departamento do processo'}
+                                </Label>
+                            ))}
+                        </fieldset>
+                        <div className="space-y-2">
+                            <Label htmlFor="required-count">
+                                Quantidade de pessoas distintas exigida
+                            </Label>
+                            <Input
+                                id="required-count"
+                                type="number"
+                                min={1}
+                                max={50}
+                                required
+                                value={form.data.required_count}
+                                onChange={(e) =>
+                                    form.setData(
+                                        'required_count',
+                                        e.target.value,
+                                    )
+                                }
+                            />
+                        </div>
+                        <div className="space-y-2">
+                            <Label htmlFor="policy-reason">
+                                Fundamento desta versão
+                            </Label>
+                            <textarea
+                                id="policy-reason"
+                                className="min-h-24 w-full rounded-md border p-3"
+                                required
+                                minLength={10}
+                                maxLength={4000}
+                                value={form.data.reason}
+                                onChange={(e) =>
+                                    form.setData('reason', e.target.value)
+                                }
+                            />
+                        </div>
+                        <Button disabled={form.processing}>
+                            Registar versão {latest ? latest.revision + 1 : 1}
+                        </Button>
+                    </form>
+                </Panel>
+                <Panel title="Versões preservadas">
+                    <div className="space-y-4">
+                        {policies.data.length === 0 && (
+                            <p>A empresa ainda não definiu uma política.</p>
+                        )}
+                        {policies.data.map((p) => (
+                            <article
+                                key={p.id}
+                                className="rounded-md border p-4"
+                            >
+                                <h2 className="font-semibold">
+                                    Versão {p.revision} ·{' '}
+                                    {p.enabled ? 'Activada' : 'Desactivada'} ·{' '}
+                                    {date(p.created_at)}
+                                </h2>
+                                <p>
+                                    {p.required_count} pessoa(s) ·{' '}
+                                    {p.roles
+                                        .map((r) => roleLabels[r] ?? r)
+                                        .join(', ')}
+                                </p>
+                                <p className="text-sm whitespace-pre-wrap">
+                                    {p.reason}
+                                </p>
+                            </article>
+                        ))}
+                        <div className="flex gap-4">
+                            {policies.prev_page_url && (
+                                <Link href={policies.prev_page_url}>
+                                    Anteriores
+                                </Link>
+                            )}
+                            {policies.next_page_url && (
+                                <Link href={policies.next_page_url}>
+                                    Seguintes
+                                </Link>
+                            )}
+                        </div>
+                    </div>
+                </Panel>
+            </div>
+        </>
+    );
+}
diff --git a/resources/js/pages/purchases/admission.tsx b/resources/js/pages/purchases/admission.tsx
new file mode 100644
index 0000000..772223a
--- /dev/null
+++ b/resources/js/pages/purchases/admission.tsx
@@ -0,0 +1,416 @@
+import { Head, Link, router, useForm } from '@inertiajs/react';
+import { FormErrors, PageTitle, Panel } from '@/components/procurement';
+import { Button } from '@/components/ui/button';
+import { Label } from '@/components/ui/label';
+import { date, roleLabels } from '@/types/procurement';
+
+type Adoption = {
+    id: number;
+    revision: number;
+    admission_policy_id: number;
+    reason: string;
+    snapshot: {
+        roles: string[];
+        required_count: number;
+        policy_revision: number;
+    };
+};
+type Proposal = {
+    id: number;
+    reference: string;
+    supplier: { name: string } | null;
+    basisHash: string | null;
+    clear: boolean;
+    previousId: number;
+};
+type Review = {
+    id: number;
+    verdict: string;
+    reason: string;
+    created_at: string;
+    snapshot: { name: string; purchasing_role: string };
+};
+type Decision = {
+    id: number;
+    revision: number;
+    quotation_id: number;
+    outcome: string;
+    reason: string;
+    status: string;
+    current: boolean;
+    canReview: boolean;
+    created_at: string;
+    snapshot: { proponent: { name: string } };
+    reviews: Review[];
+};
+type Props = {
+    requisition: { id: number; number: string };
+    policy: { id: number; revision: number; enabled: boolean } | null;
+    adoption: Adoption | null;
+    selected: Adoption | null;
+    adoptions: Adoption[];
+    proposals: Proposal[];
+    history: {
+        data: Decision[];
+        prev_page_url: string | null;
+        next_page_url: string | null;
+    };
+    canAdopt: boolean;
+    canPropose: boolean;
+    closed: boolean;
+};
+const selectClass = 'h-10 w-full rounded-md border bg-background px-3 text-sm';
+const outcomes: Record<string, string> = {
+    admit: 'Admitir',
+    exclude: 'Excluir',
+    clarify: 'Solicitar esclarecimento interno',
+};
+const statuses: Record<string, string> = {
+    pending: 'A aguardar conferência',
+    confirmed: 'Decisão confirmada',
+    returned: 'Tentativa devolvida',
+};
+function Reason({
+    value,
+    onChange,
+    id,
+}: {
+    value: string;
+    onChange: (value: string) => void;
+    id: string;
+}) {
+    return (
+        <div className="space-y-2">
+            <Label htmlFor={id}>Fundamento</Label>
+            <textarea
+                className="min-h-24 w-full rounded-md border p-3"
+                id={id}
+                required
+                minLength={10}
+                maxLength={4000}
+                value={value}
+                onChange={(e) => onChange(e.target.value)}
+            />
+        </div>
+    );
+}
+function Adopt({
+    requisition,
+    policy,
+    adoption,
+}: Pick<Props, 'requisition' | 'policy' | 'adoption'>) {
+    const form = useForm({
+        policy_id: policy?.id ?? 0,
+        previous_id: adoption?.id ?? 0,
+        reason: '',
+    });
+    if (!policy?.enabled || adoption?.admission_policy_id === policy.id)
+        return (
+            <p className="text-sm">
+                {!policy?.enabled
+                    ? 'Sem política activa para nova adopção. A Administração configura a política da empresa.'
+                    : 'O processo já adoptou a versão activa.'}
+            </p>
+        );
+    return (
+        <form
+            className="space-y-4"
+            onSubmit={(e) => {
+                e.preventDefault();
+                form.post(`/requisicoes/${requisition.id}/admissao/adoptar`);
+            }}
+        >
+            <FormErrors errors={form.errors} />
+            <p>
+                Adoptar expressamente a política versão {policy.revision}. A
+                adopção exige decisões e conferências próprias; não permite
+                regressar ao circuito sem admissão.
+            </p>
+            <Reason
+                id="adopt-reason"
+                value={form.data.reason}
+                onChange={(v) => form.setData('reason', v)}
+            />
+            <Button disabled={form.processing}>
+                Adoptar política neste processo
+            </Button>
+        </form>
+    );
+}
+function Propose({ proposal, id }: { proposal: Proposal; id: number }) {
+    const form = useForm({
+        quotation_id: proposal.id,
+        previous_id: proposal.previousId,
+        basis_hash: proposal.basisHash ?? '',
+        outcome: '',
+        reason: '',
+    });
+    if (!proposal.basisHash)
+        return (
+            <p className="text-sm">
+                Actualize a qualificação documental para poder propor uma
+                decisão.
+            </p>
+        );
+    return (
+        <form
+            className="space-y-4"
+            onSubmit={(e) => {
+                e.preventDefault();
+                form.post(`/requisicoes/${id}/admissao/decisoes`);
+            }}
+        >
+            <FormErrors errors={form.errors} />
+            <div className="space-y-2">
+                <Label htmlFor={`outcome-${proposal.id}`}>
+                    Proposta de decisão
+                </Label>
+                <select
+                    id={`outcome-${proposal.id}`}
+                    className={selectClass}
+                    required
+                    value={form.data.outcome}
+                    onChange={(e) => form.setData('outcome', e.target.value)}
+                >
+                    <option value="">Seleccione</option>
+                    {Object.entries(outcomes).map(([value, label]) => (
+                        <option
+                            key={value}
+                            value={value}
+                            disabled={value === 'admit' && !proposal.clear}
+                        >
+                            {label}
+                        </option>
+                    ))}
+                </select>
+            </div>
+            {!proposal.clear && (
+                <p className="text-sm text-muted-foreground">
+                    A admissão está impedida: faltam análises, há
+                    pendências/divergências ou requisitos obrigatórios por
+                    resolver.
+                </p>
+            )}
+            <Reason
+                id={`propose-reason-${proposal.id}`}
+                value={form.data.reason}
+                onChange={(v) => form.setData('reason', v)}
+            />
+            <Button disabled={form.processing}>Registar nova tentativa</Button>
+        </form>
+    );
+}
+function Confer({ decision }: { decision: Decision }) {
+    const form = useForm({ verdict: '', reason: '' });
+    return (
+        <form
+            className="mt-4 space-y-4"
+            onSubmit={(e) => {
+                e.preventDefault();
+                form.post(`/admissoes/${decision.id}/conferir`);
+            }}
+        >
+            <FormErrors errors={form.errors} />
+            <Label htmlFor={`review-${decision.id}`}>
+                Conferência independente
+            </Label>
+            <select
+                id={`review-${decision.id}`}
+                required
+                className={selectClass}
+                value={form.data.verdict}
+                onChange={(e) => form.setData('verdict', e.target.value)}
+            >
+                <option value="">Seleccione</option>
+                <option value="approved">Confirmar a decisão proposta</option>
+                <option value="returned">Devolver esta tentativa</option>
+            </select>
+            <Reason
+                id={`review-reason-${decision.id}`}
+                value={form.data.reason}
+                onChange={(v) => form.setData('reason', v)}
+            />
+            <Button disabled={form.processing}>Registar conferência</Button>
+        </form>
+    );
+}
+export default function Admission({
+    requisition,
+    policy,
+    adoption,
+    selected,
+    adoptions,
+    proposals,
+    history,
+    canAdopt,
+    canPropose,
+    closed,
+}: Props) {
+    const base = `/requisicoes/${requisition.id}`;
+    return (
+        <>
+            <Head title={`Admissão · ${requisition.number}`} />
+            <div className="mx-auto flex max-w-7xl flex-col gap-6 p-5 lg:p-8">
+                <PageTitle
+                    eyebrow="Compras"
+                    title={`Admissão de propostas · ${requisition.number}`}
+                    description="Sistema de Gestão de Compras (SGC) · Decisões e conferências preservadas"
+                />
+                <nav className="mb-5 flex flex-wrap gap-4 text-sm">
+                    <Link href={`${base}/processo`}>Processo completo</Link>
+                    <Link href={`${base}/qualificacao`}>
+                        Qualificação documental
+                    </Link>
+                    <Link href={`${base}/cotacoes`}>Comparação</Link>
+                </nav>
+                <Panel title="Regime do processo">
+                    <p className="mb-4">
+                        {adoption
+                            ? `Adopção ${adoption.revision}: política ${adoption.snapshot.policy_revision}, ${adoption.snapshot.required_count} pessoa(s) distinta(s), ${adoption.snapshot.roles.map((r) => roleLabels[r] ?? r).join(', ')}.`
+                            : 'Sem adopção: mantém-se o circuito de comparação e adjudicação existente.'}
+                    </p>
+                    <p className="mb-4 text-sm text-muted-foreground">
+                        Admissão não autoriza compra. Mantêm-se pontuação,
+                        conflitos, orçamento, aprovações e o mínimo existente de
+                        três fornecedores elegíveis com duas avaliações por
+                        proposta. Esclarecimentos são registos internos, sem
+                        envio de comunicações.
+                    </p>
+                    {closed && (
+                        <p>
+                            O processo está fechado para alterações de admissão.
+                        </p>
+                    )}
+                    {canAdopt && (
+                        <Adopt
+                            key={policy?.id}
+                            requisition={requisition}
+                            policy={policy}
+                            adoption={adoption}
+                        />
+                    )}
+                </Panel>
+                {adoptions.length > 0 && (
+                    <Panel title="Versão consultada">
+                        <Label htmlFor="adoption-version">
+                            Histórico de adopções
+                        </Label>
+                        <select
+                            id="adoption-version"
+                            className={`${selectClass} mt-2`}
+                            value={selected?.id ?? ''}
+                            onChange={(e) =>
+                                router.get(`${base}/admissao`, {
+                                    version: e.target.value,
+                                })
+                            }
+                        >
+                            {adoptions.map((a) => (
+                                <option key={a.id} value={a.id}>
+                                    Adopção {a.revision} · política{' '}
+                                    {a.snapshot.policy_revision}
+                                    {a.id === adoption?.id
+                                        ? ' · actual'
+                                        : ' · histórica'}
+                                </option>
+                            ))}
+                        </select>
+                        <p className="mt-3 text-sm whitespace-pre-wrap">
+                            {selected?.reason}
+                        </p>
+                    </Panel>
+                )}
+                {canPropose && (
+                    <Panel title="Propor decisões">
+                        <div className="space-y-5">
+                            {proposals.map((p) => (
+                                <article
+                                    key={`${p.id}-${p.previousId}-${p.basisHash}`}
+                                    className="rounded-md border p-4"
+                                >
+                                    <h2 className="mb-4 font-semibold">
+                                        {p.supplier?.name ?? 'Fornecedor'} ·{' '}
+                                        {p.reference}
+                                    </h2>
+                                    <Propose proposal={p} id={requisition.id} />
+                                </article>
+                            ))}
+                        </div>
+                    </Panel>
+                )}
+                <Panel title="Tentativas e conferências">
+                    <div className="space-y-5">
+                        {history.data.length === 0 && (
+                            <p>Ainda não há tentativas nesta adopção.</p>
+                        )}
+                        {history.data.map((d) => (
+                            <article
+                                key={d.id}
+                                className="rounded-md border p-4"
+                            >
+                                <h2 className="font-semibold">
+                                    {proposals.find(
+                                        (p) => p.id === d.quotation_id,
+                                    )?.supplier?.name ??
+                                        `Proposta ${d.quotation_id}`}{' '}
+                                    · tentativa {d.revision} ·{' '}
+                                    {outcomes[d.outcome]}
+                                </h2>
+                                <p className="text-sm">
+                                    {statuses[d.status]}
+                                    {!d.current &&
+                                        ' · histórica ou base desactualizada'}{' '}
+                                    · {date(d.created_at)} ·{' '}
+                                    {d.snapshot.proponent.name}
+                                </p>
+                                <p className="my-3 whitespace-pre-wrap">
+                                    {d.reason}
+                                </p>
+                                {d.reviews.map((r) => (
+                                    <div
+                                        key={r.id}
+                                        className="mt-2 rounded-md bg-muted p-3 text-sm"
+                                    >
+                                        <p>
+                                            {r.snapshot.name} ·{' '}
+                                            {roleLabels[
+                                                r.snapshot.purchasing_role
+                                            ] ??
+                                                r.snapshot.purchasing_role}{' '}
+                                            ·{' '}
+                                            {r.verdict === 'approved'
+                                                ? 'Confirmou'
+                                                : 'Devolveu'}{' '}
+                                            · {date(r.created_at)}
+                                        </p>
+                                        <p className="whitespace-pre-wrap">
+                                            {r.reason}
+                                        </p>
+                                    </div>
+                                ))}
+                                {d.canReview && <Confer decision={d} />}
+                            </article>
+                        ))}
+                        <p className="text-sm text-muted-foreground">
+                            Devolver impede a conclusão da tentativa e exige
+                            nova proposta fundamentada. Não exclui
+                            automaticamente o concorrente.
+                        </p>
+                        <div className="flex gap-4">
+                            {history.prev_page_url && (
+                                <Link href={history.prev_page_url}>
+                                    Anteriores
+                                </Link>
+                            )}
+                            {history.next_page_url && (
+                                <Link href={history.next_page_url}>
+                                    Seguintes
+                                </Link>
+                            )}
+                        </div>
+                    </div>
+                </Panel>
+            </div>
+        </>
+    );
+}
diff --git a/resources/js/pages/purchases/process.tsx b/resources/js/pages/purchases/process.tsx
index 9bf3b6c..cd6123b 100644
--- a/resources/js/pages/purchases/process.tsx
+++ b/resources/js/pages/purchases/process.tsx
@@ -50,6 +50,9 @@ const labels: Record<string, string> = {
 const events: Record<string, string> = {
     'qualification.defined': 'Versão dos requisitos documentais registada',
     'qualification.assessed': 'Versão da análise documental registada',
+    'admission.adopted': 'Política de admissão adoptada expressamente',
+    'admission.proposed': 'Tentativa de decisão de admissão registada',
+    'admission.reviewed': 'Conferência independente de admissão registada',
     'opening.recorded': 'Versão da acta de abertura registada',
     'requisition.created': 'Requisição criada',
     'requisition.updated': 'Requisição actualizada',
diff --git a/resources/js/pages/purchases/qualification.tsx b/resources/js/pages/purchases/qualification.tsx
index b5a7eaf..b6a9bde 100644
--- a/resources/js/pages/purchases/qualification.tsx
+++ b/resources/js/pages/purchases/qualification.tsx
@@ -555,12 +555,20 @@ export default function QualificationPage(props: Props) {
                     </p>
                 )}
                 <div className="rounded-xl border border-amber-200 bg-amber-50 p-4 text-sm text-amber-950">
-                    Requisitos e resultados documentais para conferência. Não
-                    admitem ou excluem concorrentes, certificam evidências ou
-                    alteram a comparação ponderada e a adjudicação. Não
-                    aplicável exige fundamento e não dispensa automaticamente um
-                    requisito obrigatório.
+                    Os requisitos e resultados documentais apoiam a conferência;
+                    não constituem uma decisão formal nem certificam evidências.
+                    Num processo que adoptou o regime de admissão, estas versões
+                    integram a base da decisão e alterações exigem reapreciação.
+                    Não aplicável exige fundamento e não dispensa
+                    automaticamente um requisito obrigatório. As pontuações
+                    mantêm o cálculo ponderado existente.
                 </div>
+                <Link
+                    className="text-sm underline"
+                    href={`/requisicoes/${requisition.id}/admissao`}
+                >
+                    Consultar regime, decisões e conferências de admissão
+                </Link>
                 <Link
                     className="text-sm underline"
                     href={`/requisicoes/${requisition.id}/cotacoes`}
diff --git a/resources/js/pages/purchases/review-report.tsx b/resources/js/pages/purchases/review-report.tsx
index a96dac9..8d822e4 100644
--- a/resources/js/pages/purchases/review-report.tsx
+++ b/resources/js/pages/purchases/review-report.tsx
@@ -54,6 +54,16 @@ type Report = {
         requester: string;
     };
     comparison: { ready: boolean; top_count: number; rows: ComparisonRow[] };
+    admission: {
+        id: number;
+        revision: number;
+        reason: string;
+        snapshot: {
+            policy_revision: number;
+            required_count: number;
+            roles: string[];
+        };
+    } | null;
     qualification: {
         id: number;
         revision: number;
@@ -159,6 +169,17 @@ export default function ReviewReport({ report }: { report: Report }) {
                     a qualificação documental são apresentadas separadamente.
                 </div>
                 <Panel title="Identificação do pedido">
+                    <p className="mb-4 text-sm">
+                        {report.admission
+                            ? `Regime de admissão adoptado: política ${report.admission.snapshot.policy_revision}, ${report.admission.snapshot.required_count} confirmações independentes. A elegibilidade da comparação inclui admissão confirmada na base actual.`
+                            : 'Sem adopção do regime de admissão: mantém-se o circuito de comparação existente.'}{' '}
+                        <Link
+                            className="underline print:hidden"
+                            href={`/requisicoes/${r.id}/admissao`}
+                        >
+                            Consultar decisões e conferências de admissão
+                        </Link>
+                    </p>
                     {r.status !== 'approved' && (
                         <p className="mb-3 text-sm text-muted-foreground">
                             O pedido não está em estado aprovado. As pontuações
@@ -282,10 +303,9 @@ export default function ReviewReport({ report }: { report: Report }) {
                                                         </ul>
                                                     ) : (
                                                         <p>
-                                                            Sem impedimentos
-                                                            assinalados por esta
-                                                            matriz. Não equivale
-                                                            a admissão formal.
+                                                            {report.admission
+                                                                ? 'Sem impedimentos nesta matriz, incluindo admissão confirmada na base actual. Não autoriza compra.'
+                                                                : 'Sem impedimentos assinalados por esta matriz. Não equivale a admissão formal.'}
                                                         </p>
                                                     )}
                                                 </td>
diff --git a/resources/js/pages/quotations/show.tsx b/resources/js/pages/quotations/show.tsx
index 8e04c8c..181a705 100644
--- a/resources/js/pages/quotations/show.tsx
+++ b/resources/js/pages/quotations/show.tsx
@@ -122,6 +122,12 @@ export default function Comparison({
                 >
                     Qualificação documental
                 </Link>
+                <Link
+                    className="text-sm font-medium underline"
+                    href={`/requisicoes/${requisition.id}/admissao`}
+                >
+                    Admissão e exclusão de propostas
+                </Link>
                 <Link
                     className="text-sm font-medium underline"
                     href={`/requisicoes/${requisition.id}/relatorio`}
diff --git a/resources/views/app.blade.php b/resources/views/app.blade.php
index 20ce3be..6987b35 100644
--- a/resources/views/app.blade.php
+++ b/resources/views/app.blade.php
@@ -39,7 +39,7 @@
         @viteReactRefresh
         @vite(['resources/css/app.css', 'resources/js/app.tsx', "resources/js/pages/{$page['component']}.tsx"])
         <x-inertia::head>
-            <title>{{ config('app.name', 'Laravel') }}</title>
+            <title>Sistema de Gestão de Compras (SGC)</title>
         </x-inertia::head>
     </head>
     <body class="font-sans antialiased">
diff --git a/routes/web.php b/routes/web.php
index 88d43c5..e10a463 100644
--- a/routes/web.php
+++ b/routes/web.php
@@ -7,6 +7,7 @@ use App\Http\Controllers\ConflictDeclarationController;
 use App\Http\Controllers\DocumentaryQualificationController;
 use App\Http\Controllers\EquipmentController;
 use App\Http\Controllers\ExternalPaymentController;
+use App\Http\Controllers\FormalAdmissionController;
 use App\Http\Controllers\GoodsReceiptController;
 use App\Http\Controllers\InvestmentPolicyController;
 use App\Http\Controllers\InvoiceController;
@@ -35,6 +36,12 @@ Route::middleware(['auth', 'verified'])->group(function () {
     Route::post('empresa/iniciar', [CompanyController::class, 'store'])->name('company.store');
 
     Route::middleware(EnsureCompanyIsConfigured::class)->group(function () {
+        Route::get('politica-admissao', [FormalAdmissionController::class, 'policy'])->name('admissions.policy');
+        Route::post('politica-admissao', [FormalAdmissionController::class, 'configure']);
+        Route::get('requisicoes/{requisition}/admissao', [FormalAdmissionController::class, 'show'])->name('admissions.show');
+        Route::post('requisicoes/{requisition}/admissao/adoptar', [FormalAdmissionController::class, 'adopt']);
+        Route::post('requisicoes/{requisition}/admissao/decisoes', [FormalAdmissionController::class, 'propose']);
+        Route::post('admissoes/{decision}/conferir', [FormalAdmissionController::class, 'review']);
         Route::get('requisicoes/{requisition}/relatorio', [ProcurementReviewReportController::class, 'show'])->name('purchases.report');
         Route::get('requisicoes/{requisition}/qualificacao', [DocumentaryQualificationController::class, 'show'])->name('qualifications.show');
         Route::post('requisicoes/{requisition}/qualificacao', [DocumentaryQualificationController::class, 'define']);
diff --git a/tests/Concurrency/admission-worker.php b/tests/Concurrency/admission-worker.php
new file mode 100644
index 0000000..d416c5f
--- /dev/null
+++ b/tests/Concurrency/admission-worker.php
@@ -0,0 +1,34 @@
+<?php
+
+use App\Models\AdmissionDecision;
+use App\Models\User;
+use App\Services\FormalAdmission;
+use Illuminate\Contracts\Console\Kernel;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Validation\ValidationException;
+use Symfony\Component\HttpKernel\Exception\HttpExceptionInterface;
+
+require __DIR__.'/../../vendor/autoload.php';
+$database = $argv[1] ?? '';
+if (! preg_match('/^compras_receipts_test_[a-f0-9]{12}$/', $database)) {
+    throw new LogicException('Base de teste inválida.');
+}
+$app = require __DIR__.'/../../bootstrap/app.php';
+$app->make(Kernel::class)->bootstrap();
+if (! $app->environment('testing') || DB::connection()->getDatabaseName() !== $database) {
+    throw new LogicException('Worker não isolado.');
+}
+DB::select('select set_config(?, ?, false)', ['application_name', 'sgc_admission_'.$argv[4]]);
+$pid = DB::selectOne('select pg_backend_pid() as pid')->pid;
+$actor = User::query()->findOrFail($argv[2]);
+auth()->guard()->setUser($actor);
+$payload = json_decode(stream_get_contents(STDIN), true, 512, JSON_THROW_ON_ERROR);
+try {
+    app(FormalAdmission::class)->review($actor, AdmissionDecision::query()->findOrFail($argv[3]), $payload['verdict'], 'Conferência exclusivamente fictícia');
+    $status = 200;
+} catch (ValidationException) {
+    $status = 422;
+} catch (HttpExceptionInterface $exception) {
+    $status = $exception->getStatusCode();
+}
+echo json_encode(['status' => $status, 'backend_pid' => $pid], JSON_THROW_ON_ERROR);
diff --git a/tests/Concurrency/run-admission.php b/tests/Concurrency/run-admission.php
new file mode 100644
index 0000000..00aec59
--- /dev/null
+++ b/tests/Concurrency/run-admission.php
@@ -0,0 +1,136 @@
+<?php
+
+use App\Models\AdmissionDecision;
+use App\Models\AdmissionReview;
+use App\Models\AuditLog;
+use App\Services\FormalAdmission;
+use Illuminate\Contracts\Console\Kernel;
+use Illuminate\Support\Facades\Artisan;
+use Illuminate\Support\Facades\DB;
+use Illuminate\Support\Facades\Schema;
+use Symfony\Component\Process\Process;
+
+require __DIR__.'/../../vendor/autoload.php';
+foreach (['APP_ENV' => 'testing', 'CACHE_STORE' => 'array', 'SESSION_DRIVER' => 'array', 'QUEUE_CONNECTION' => 'sync', 'MAIL_MAILER' => 'array'] as $key => $value) {
+    putenv($key.'='.$value);
+    $_ENV[$key] = $_SERVER[$key] = $value;
+}
+$app = require __DIR__.'/../../bootstrap/app.php';
+$app->make(Kernel::class)->bootstrap();
+require __DIR__.'/../Support/AdmissionFixture.php';
+$original = DB::connection();
+if ($original->getDriverName() !== 'pgsql') {
+    throw new LogicException('Exige PostgreSQL.');
+}
+$config = $original->getConfig();
+$admin = $original->getPdo();
+$database = 'compras_receipts_test_'.bin2hex(random_bytes(6));
+$created = false;
+$processes = [];
+$report = ['tested_at_utc' => gmdate('c'), 'separate_database' => true, 'transport' => 'Independent PHP service transactions and PostgreSQL connections', 'scenarios' => []];
+try {
+    $admin->exec('CREATE DATABASE "'.$database.'"');
+    $created = true;
+    config(['database.connections.pgsql' => [...$config, 'database' => $database, 'url' => null]]);
+    DB::purge('pgsql');
+    DB::setDefaultConnection('pgsql');
+    Schema::clearResolvedInstance('db.schema');
+    app()->forgetInstance('db.schema');
+    if (DB::connection()->getDatabaseName() !== $database || Schema::getConnection()->getDatabaseName() !== $database) {
+        throw new LogicException('Migração fora do isolamento recusada.');
+    }
+    Artisan::call('migrate', ['--database' => 'pgsql', '--force' => true]);
+    $workerEnv = ['APP_ENV' => 'testing', 'DB_CONNECTION' => 'pgsql', 'DB_URL' => '', 'DB_DATABASE' => $database, 'DB_HOST' => $config['host'], 'DB_PORT' => (string) $config['port'], 'DB_USERNAME' => $config['username'], 'DB_PASSWORD' => $config['password'], 'CACHE_STORE' => 'array', 'SESSION_DRIVER' => 'array'];
+    foreach (['same_person', 'distinct_people', 'opposing_reviews', 'revoked_role', 'changed_basis', 'new_adoption'] as $scenario) {
+        $f = admissionFixture(2);
+        $workflow = app(FormalAdmission::class);
+        $decision = $workflow->propose($f['buyer'], $f['r'], $f['proposal']);
+        $connection = DB::connection();
+        $connection->beginTransaction();
+        $connection->table('tenants')->where('id', $f['tenant']->id)->lockForUpdate()->first();
+        $processes = [];
+        foreach (['A', 'B'] as $index => $suffix) {
+            $actor = $scenario === 'distinct_people' && $index === 1 ? $f['other_analyst'] : $f['analyst'];
+            $verdict = $scenario === 'opposing_reviews' && $index === 1 ? 'returned' : 'approved';
+            $process = new Process([PHP_BINARY, __DIR__.'/admission-worker.php', $database, (string) $actor->id, (string) $decision->id, $suffix], base_path(), $workerEnv);
+            $process->setInput(json_encode(['verdict' => $verdict], JSON_THROW_ON_ERROR));
+            $process->setTimeout(40);
+            $process->start();
+            $processes[] = $process;
+        }
+        $statement = $admin->prepare("SELECT count(*) FROM pg_stat_activity WHERE datname = ? AND application_name IN ('sgc_admission_A','sgc_admission_B') AND wait_event_type = 'Lock'");
+        $deadline = microtime(true) + 20;
+        do {
+            $statement->execute([$database]);
+            $waits = (int) $statement->fetchColumn();
+            if ($waits === 2) {
+                break;
+            }
+            foreach ($processes as $process) {
+                if (! $process->isRunning()) {
+                    throw new RuntimeException('Worker terminou antes do bloqueio: '.$process->getErrorOutput());
+                }
+            }
+            usleep(20000);
+        } while (microtime(true) < $deadline);
+        if ($waits !== 2) {
+            throw new RuntimeException('Sem sobreposição dos dois bloqueios.');
+        }
+        if ($scenario === 'revoked_role') {
+            $connection->table('users')->where('id', $f['analyst']->id)->update(['purchasing_role' => 'requester']);
+        }
+        if ($scenario === 'changed_basis') {
+            $connection->table('quotations')->where('id', $f['quote']->id)->update(['reference' => 'Alteração fictícia durante a espera']);
+        }
+        if ($scenario === 'new_adoption') {
+            auth()->guard()->setUser($f['admin']);
+            $policy = $workflow->policy($f['admin'], [...$f['policy_data'], 'previous_id' => $f['policy']->id]);
+            auth()->guard()->setUser($f['buyer']);
+            $workflow->adopt($f['buyer'], $f['r'], $policy->id, $f['adoption']->id, 'Nova adopção enquanto os conferentes aguardam');
+        }
+        $connection->commit();
+        $results = [];
+        foreach ($processes as $process) {
+            $process->wait();
+            if (! $process->isSuccessful()) {
+                throw new RuntimeException('Worker falhou: '.$process->getErrorOutput());
+            }
+            $results[] = json_decode($process->getOutput(), true, 512, JSON_THROW_ON_ERROR);
+        }
+        $statuses = array_column($results, 'status');
+        sort($statuses);
+        $expected = match ($scenario) {
+            'revoked_role' => [403, 403], 'changed_basis', 'new_adoption' => [422, 422], 'opposing_reviews' => [200, 422], default => [200, 200]
+        };
+        auth()->guard()->setUser($f['buyer']);
+        $reviews = AdmissionReview::query()->count();
+        $expectedReviews = match ($scenario) {
+            'distinct_people' => 2, 'same_person', 'opposing_reviews' => 1, default => 0
+        };
+        if ($statuses !== $expected || $reviews !== $expectedReviews || AuditLog::query()->where('action', 'admission.reviewed')->count() !== $reviews || count(array_unique(array_column($results, 'backend_pid'))) !== 2) {
+            throw new RuntimeException('Resultado concorrente inconsistente: '.json_encode([$scenario, $statuses, $reviews], JSON_THROW_ON_ERROR));
+        }
+        $state = $workflow->status($decision, $f['adoption']);
+        if (($scenario === 'distinct_people' && $state !== 'confirmed') || ($scenario === 'same_person' && $state !== 'pending') || AdmissionDecision::query()->count() !== 1) {
+            throw new RuntimeException('Quórum ou tentativa alterados indevidamente.');
+        }
+        $report['scenarios'][] = ['name' => $scenario, 'passed' => true, 'overlapping_lock_waits' => $waits, 'reviews' => $reviews, 'state' => $state];
+    }
+    $report['passed'] = true;
+} finally {
+    foreach ($processes as $process) {
+        if ($process->isRunning()) {
+            $process->stop();
+        }
+    }
+    if (isset($connection) && $connection->transactionLevel() > 0) {
+        $connection->rollBack();
+    }
+    DB::disconnect('pgsql');
+    if ($created && $database !== $original->getDatabaseName() && preg_match('/^compras_receipts_test_[a-f0-9]{12}$/', $database)) {
+        $admin->exec('DROP DATABASE "'.$database.'"');
+        $report['test_database_dropped'] = true;
+    }
+}
+file_put_contents(base_path('docs/admissao-concorrencia-postgresql.json'), json_encode($report, JSON_PRETTY_PRINT | JSON_THROW_ON_ERROR).PHP_EOL);
+echo json_encode($report, JSON_PRETTY_PRINT | JSON_THROW_ON_ERROR).PHP_EOL;
diff --git a/tests/Feature/FormalAdmissionTest.php b/tests/Feature/FormalAdmissionTest.php
new file mode 100644
index 0000000..e4ca7cb
--- /dev/null
+++ b/tests/Feature/FormalAdmissionTest.php
@@ -0,0 +1,168 @@
+<?php
+
+use App\Enums\PurchasingRole;
+use App\Models\AdmissionDecision;
+use App\Models\AdmissionPolicy;
+use App\Models\AdmissionReview;
+use App\Models\AuditLog;
+use App\Models\BudgetEntry;
+use App\Models\ConflictDeclaration;
+use App\Models\Department;
+use App\Models\Tenant;
+use App\Models\User;
+use App\Services\DocumentaryQualificationWorkflow;
+use App\Services\FormalAdmission;
+use Illuminate\Database\QueryException;
+use Illuminate\Support\Facades\DB;
+use Inertia\Testing\AssertableInertia as Assert;
+
+require_once __DIR__.'/../Support/AdmissionFixture.php';
+
+beforeEach(function () {
+    $this->f = admissionFixture();
+    $this->url = '/requisicoes/'.$this->f['r']->id.'/admissao';
+    $this->actingAs($this->f['buyer']);
+});
+
+function admissionAttempt(object $test, array $changes = []): AdmissionDecision
+{
+    $test->actingAs($test->f['buyer'])->post($test->url.'/decisoes', [...$test->f['proposal'], ...$changes])->assertSessionHasNoErrors();
+
+    return AdmissionDecision::query()->latest('id')->firstOrFail();
+}
+
+function admissionConfer(object $test, AdmissionDecision $decision, ?User $actor = null, string $verdict = 'approved'): void
+{
+    $test->actingAs($actor ?? $test->f['analyst'])->post('/admissoes/'.$decision->id.'/conferir', ['verdict' => $verdict, 'reason' => 'Conferência exclusivamente fictícia'])->assertSessionHasNoErrors();
+}
+
+test('formal admission requires independent company quorum and preserves snapshots without financial writes', function () {
+    $decision = admissionAttempt($this);
+    $workflow = app(FormalAdmission::class);
+    expect($workflow->status($decision, $this->f['adoption']))->toBe('pending')->and($workflow->admitted($this->f['r'], $decision->quotation_id))->toBeFalse();
+    admissionConfer($this, $decision);
+    expect($workflow->status($decision, $this->f['adoption']))->toBe('pending');
+    admissionConfer($this, $decision, $this->f['other_analyst']);
+    $snapshot = $workflow->selection($this->f['r'], $decision->quotation_id);
+    expect($snapshot['review_ids'])->toHaveCount(2)->and($snapshot['decision_id'])->toBe($decision->id)->and(BudgetEntry::query()->count())->toBe(0);
+    $this->f['analyst']->forceFill(['purchasing_role' => PurchasingRole::Requester])->save();
+    expect($workflow->selection($this->f['r'], $decision->quotation_id))->toBe($snapshot);
+    $this->get($this->url)->assertOk()->assertHeader('Cache-Control', 'max-age=0, no-store, private')->assertInertia(fn (Assert $p) => $p->component('purchases/admission')->where('history.data.0.status', 'confirmed')->has('history.data.0.reviews', 2));
+});
+
+test('identical conference retries count once and changed retries cannot overwrite', function () {
+    $decision = admissionAttempt($this);
+    admissionConfer($this, $decision);
+    admissionConfer($this, $decision);
+    expect(AdmissionReview::query()->count())->toBe(1)->and(AuditLog::query()->where('action', 'admission.reviewed')->count())->toBe(1);
+    $this->post('/admissoes/'.$decision->id.'/conferir', ['verdict' => 'returned', 'reason' => 'Outro fundamento fictício'])->assertSessionHasErrors('admission');
+    expect(AdmissionReview::query()->sole()->verdict)->toBe('approved');
+});
+
+test('return ends attempt without excluding and a new attempt starts with no reviews', function () {
+    $decision = admissionAttempt($this);
+    admissionConfer($this, $decision, null, 'returned');
+    expect(app(FormalAdmission::class)->status($decision, $this->f['adoption']))->toBe('returned')->and($decision->refresh()->outcome)->toBe('admit');
+    $this->actingAs($this->f['other_analyst'])->post('/admissoes/'.$decision->id.'/conferir', ['verdict' => 'approved', 'reason' => 'Outra conferência fictícia'])->assertSessionHasErrors('admission');
+    $next = admissionAttempt($this, ['previous_id' => $decision->id]);
+    expect($next->revision)->toBe(2)->and(AdmissionReview::query()->where('admission_decision_id', $next->id)->count())->toBe(0);
+    $this->post($this->url.'/decisoes', $this->f['proposal'])->assertSessionHasErrors('admission');
+});
+
+test('pending divergent and unmet mandatory qualification cannot be admitted', function (string $result) {
+    $answers = $this->f['assessment']['answers'];
+    $answers[0]['result'] = $result;
+    $this->actingAs($this->f['analyst']);
+    app(DocumentaryQualificationWorkflow::class)->assess($this->f['analyst'], $this->f['set'], [...$this->f['assessment'], 'previous_id' => $this->f['record']->id, 'answers' => $answers]);
+    $basis = app(FormalAdmission::class)->basis($this->f['r'], $this->f['quote']->id);
+    $this->actingAs($this->f['buyer'])->post($this->url.'/decisoes', [...$this->f['proposal'], 'basis_hash' => $basis['hash']])->assertSessionHasErrors('admission');
+    $decision = admissionAttempt($this, ['basis_hash' => $basis['hash'], 'outcome' => 'clarify']);
+    admissionConfer($this, $decision);
+    admissionConfer($this, $decision, $this->f['other_analyst']);
+    expect(app(FormalAdmission::class)->admitted($this->f['r'], $decision->quotation_id))->toBeFalse();
+})->with(['pending', 'not_met', 'not_applicable']);
+
+test('optional uniform non compliance is permitted but analyst divergence is not', function () {
+    $answers = $this->f['assessment']['answers'];
+    $answers[1]['result'] = 'not_met';
+    $this->actingAs($this->f['analyst']);
+    app(DocumentaryQualificationWorkflow::class)->assess($this->f['analyst'], $this->f['set'], [...$this->f['assessment'], 'previous_id' => $this->f['record']->id, 'answers' => $answers]);
+    expect(app(FormalAdmission::class)->basis($this->f['r'], $this->f['quote']->id)['clear'])->toBeTrue();
+    $this->actingAs($this->f['other_analyst']);
+    app(DocumentaryQualificationWorkflow::class)->assess($this->f['other_analyst'], $this->f['set'], $this->f['assessment']);
+    expect(app(FormalAdmission::class)->basis($this->f['r'], $this->f['quote']->id)['clear'])->toBeFalse();
+});
+
+test('qualification changes invalidate pending reviews and confirmed selection', function () {
+    $decision = admissionAttempt($this);
+    admissionConfer($this, $decision);
+    $this->f['quote']->update(['reference' => 'Base modificada no teste']);
+    $this->actingAs($this->f['other_analyst'])->post('/admissoes/'.$decision->id.'/conferir', ['verdict' => 'approved', 'reason' => 'Conferência sobre base antiga'])->assertSessionHasErrors('admission');
+    expect(app(FormalAdmission::class)->admitted($this->f['r'], $decision->quotation_id))->toBeFalse()->and(AdmissionReview::query()->count())->toBe(1);
+});
+
+test('new company policy never rewrites a pinned process and new adoption resets decisions', function () {
+    $decision = admissionAttempt($this);
+    admissionConfer($this, $decision);
+    $this->actingAs($this->f['admin']);
+    $workflow = app(FormalAdmission::class);
+    $new = $workflow->policy($this->f['admin'], [...$this->f['policy_data'], 'previous_id' => $this->f['policy']->id, 'required_count' => 1, 'enabled' => false]);
+    $this->actingAs($this->f['buyer'])->post($this->url.'/adoptar', ['policy_id' => $new->id, 'previous_id' => $this->f['adoption']->id, 'reason' => 'Tentativa fictícia desactivada'])->assertSessionHasErrors('admission');
+    admissionConfer($this, $decision, $this->f['other_analyst']);
+    expect($workflow->admitted($this->f['r'], $decision->quotation_id))->toBeTrue()->and($this->f['adoption']->refresh()->snapshot['required_count'])->toBe(2);
+    $this->actingAs($this->f['admin']);
+    $enabled = $workflow->policy($this->f['admin'], [...$this->f['policy_data'], 'previous_id' => $new->id, 'required_count' => 1]);
+    $this->actingAs($this->f['buyer']);
+    $next = $workflow->adopt($this->f['buyer'], $this->f['r'], $enabled->id, $this->f['adoption']->id, 'Nova versão expressamente adoptada');
+    expect($next->snapshot['required_count'])->toBe(1)->and($workflow->admitted($this->f['r'], $decision->quotation_id))->toBeFalse()->and(AdmissionDecision::query()->count())->toBe(1);
+});
+
+test('self confirmation and stale reviewer roles are rejected and prior approvals revalidated', function () {
+    $decision = admissionAttempt($this);
+    $this->f['buyer']->forceFill(['purchasing_role' => PurchasingRole::Finance])->save();
+    $this->actingAs($this->f['buyer']->fresh())->post('/admissoes/'.$decision->id.'/conferir', ['verdict' => 'approved', 'reason' => 'Tentativa fictícia de auto aprovação'])->assertForbidden();
+    admissionConfer($this, $decision);
+    $this->f['analyst']->forceFill(['purchasing_role' => PurchasingRole::Requester])->save();
+    $this->actingAs($this->f['other_analyst'])->post('/admissoes/'.$decision->id.'/conferir', ['verdict' => 'approved', 'reason' => 'Conferência com primeiro revogado'])->assertSessionHasErrors('admission');
+    $this->f['other_analyst']->forceFill(['purchasing_role' => PurchasingRole::Requester])->save();
+    $this->post('/admissoes/'.$decision->id.'/conferir', ['verdict' => 'returned', 'reason' => 'Conferente entretanto revogado'])->assertForbidden();
+    expect(AdmissionReview::query()->count())->toBe(1);
+});
+
+test('company policy requires explicit values and admin role and optimistic version', function () {
+    $this->post('/politica-admissao', $this->f['policy_data'])->assertForbidden();
+    $this->actingAs($this->f['admin'])->post('/politica-admissao', ['previous_id' => $this->f['policy']->id, 'enabled' => true, 'roles' => [], 'reason' => 'Configuração sem quórum definido'])->assertSessionHasErrors(['roles', 'required_count']);
+    $this->post('/politica-admissao', $this->f['policy_data'])->assertSessionHasErrors('admission');
+    $this->get('/politica-admissao')->assertOk()->assertInertia(fn (Assert $p) => $p->component('purchases/admission-policy')->has('policies.data', 1));
+    expect(AdmissionPolicy::query()->count())->toBe(1);
+});
+
+test('head department scope requester segregation cross tenant and audit rollback are enforced', function () {
+    $decision = admissionAttempt($this);
+    $this->actingAs($this->f['issuer'])->post($this->url.'/decisoes', $this->f['proposal'])->assertForbidden();
+    $tenant = Tenant::query()->create(['name' => 'Empresa distinta fictícia']);
+    $outsider = User::factory()->create(['tenant_id' => $tenant->id, 'purchasing_role' => PurchasingRole::Finance]);
+    $this->actingAs($outsider)->get($this->url)->assertNotFound();
+    $this->post('/admissoes/'.$decision->id.'/conferir', ['verdict' => 'approved', 'reason' => 'Conferência de outra empresa'])->assertNotFound();
+    $department = Department::query()->create(['tenant_id' => $this->f['tenant']->id, 'name' => 'Outro departamento']);
+    $head = User::factory()->create(['tenant_id' => $this->f['tenant']->id, 'department_id' => $department->id, 'purchasing_role' => PurchasingRole::DepartmentHead]);
+    $this->actingAs($head)->get($this->url)->assertNotFound();
+    $this->actingAs($this->f['buyer']);
+    $before = AdmissionDecision::query()->count();
+    DB::statement("CREATE TRIGGER fail_admission_audit BEFORE INSERT ON audit_logs WHEN NEW.action = 'admission.proposed' BEGIN SELECT RAISE(ABORT, 'test audit failure'); END");
+    try {
+        app(FormalAdmission::class)->propose($this->f['buyer'], $this->f['r'], [...$this->f['proposal'], 'previous_id' => $decision->id]);
+        $this->fail('Missing rollback');
+    } catch (QueryException) {
+        expect(AdmissionDecision::query()->count())->toBe($before);
+    } finally {
+        DB::statement('DROP TRIGGER fail_admission_audit');
+    }
+});
+
+test('active process conflict prevents conference without creating approval', function () {
+    $decision = admissionAttempt($this);
+    ConflictDeclaration::query()->create(['tenant_id' => $this->f['tenant']->id, 'user_id' => $this->f['analyst']->id, 'requisition_id' => $this->f['r']->id, 'has_conflict' => true, 'known_since' => now()->toDateString(), 'declared_at' => now(), 'reason' => 'Conflito fictício documentado']);
+    $this->actingAs($this->f['analyst'])->post('/admissoes/'.$decision->id.'/conferir', ['verdict' => 'approved', 'reason' => 'Conferência bloqueada por conflito'])->assertSessionHasErrors('conflict');
+    expect(AdmissionReview::query()->count())->toBe(0);
+});
diff --git a/tests/Feature/PurchaseAwardOrderTest.php b/tests/Feature/PurchaseAwardOrderTest.php
index 607c0ce..d93e8f2 100644
--- a/tests/Feature/PurchaseAwardOrderTest.php
+++ b/tests/Feature/PurchaseAwardOrderTest.php
@@ -1,6 +1,8 @@
 <?php
 
 use App\Enums\PurchasingRole;
+use App\Models\AdmissionAdoption;
+use App\Models\AdmissionDecision;
 use App\Models\AuditLog;
 use App\Models\AwardCancellation;
 use App\Models\Budget;
@@ -27,7 +29,9 @@ use App\Models\User;
 use App\Models\Warehouse;
 use App\Services\BudgetWorkflow;
 use App\Services\ConflictGuard;
+use App\Services\DocumentaryQualificationWorkflow;
 use App\Services\EquipmentWorkflow;
+use App\Services\FormalAdmission;
 use App\Services\ProcurementReviewReport;
 use App\Services\ProposalComparison;
 use App\Services\ProposalOpeningWorkflow;
@@ -57,6 +61,29 @@ function selectPurchaseAward(object $test): PurchaseAward
     return PurchaseAward::query()->firstOrFail();
 }
 
+function prepareFormalAwardAdmission(object $test): void
+{
+    $workflow = app(FormalAdmission::class);
+    $test->actingAs($test->admin);
+    $policy = $workflow->policy($test->admin, ['previous_id' => 0, 'enabled' => true, 'roles' => ['finance', 'department_head'], 'required_count' => 2, 'reason' => 'Política fictícia para adjudicação']);
+    $test->actingAs($test->buyer);
+    $workflow->adopt($test->buyer, $test->r, $policy->id, 0, 'Adopção fictícia antes da adjudicação');
+    $opening = app(ProposalOpeningWorkflow::class);
+    $documentary = app(DocumentaryQualificationWorkflow::class);
+    $set = $documentary->define($test->buyer, $test->r, ['previous_id' => 0, 'basis_hash' => $opening->basis($opening->proposals($test->r)), 'reason' => 'Requisito exclusivamente fictício', 'criteria' => [['label' => 'Conformidade documentada', 'category' => 'technical', 'required' => true]]]);
+    foreach ($test->quotes as $quote) {
+        $test->actingAs($test->finance);
+        $documentary->assess($test->finance, $set, ['previous_id' => 0, 'quotation_id' => $quote->id, 'reason' => 'Análise exclusivamente fictícia', 'answers' => [['criterion_id' => 1, 'result' => 'met', 'evidence' => 'Documento fictício', 'reason' => 'Conformidade confirmada no teste']]]);
+        $test->actingAs($test->buyer);
+        $decision = $workflow->propose($test->buyer, $test->r, ['quotation_id' => $quote->id, 'previous_id' => 0, 'basis_hash' => $workflow->basis($test->r, $quote->id)['hash'], 'outcome' => 'admit', 'reason' => 'Proposta fundamentada no teste']);
+        foreach ([$test->finance, $test->head] as $reviewer) {
+            $test->actingAs($reviewer);
+            $workflow->review($reviewer, $decision, 'approved', 'Conferência independente fictícia');
+        }
+    }
+    $test->actingAs($test->buyer);
+}
+
 function approvePurchaseAward(object $test, PurchaseAward $award): void
 {
     foreach ($award->approvals()->get() as $step) {
@@ -644,3 +671,52 @@ test('review report reflects tied source scores and existing frozen orders witho
     $report = app(ProcurementReviewReport::class)->build($this->buyer, $this->r->id);
     expect($report['order']['number'])->toBe($order->number)->and($report['order']['total_minor'])->toBe(10000);
 });
+
+test('adopted formal admission preserves scoring and binds award and issued order', function () {
+    $before = app(ProposalComparison::class)->inspect($this->r);
+    prepareFormalAwardAdmission($this);
+    $after = app(ProposalComparison::class)->inspect($this->r);
+    expect($after['ready'])->toBeTrue()->and(array_column($after['rows'], 'score_minor'))->toBe(array_column($before['rows'], 'score_minor'));
+    $award = selectPurchaseAward($this);
+    expect($award->admission_snapshot['review_ids'])->toHaveCount(2)->and($award->admission_snapshot['adoption_id'])->toBeGreaterThan(0);
+    $order = issuePurchaseOrder($this, $award);
+    expect($order->snapshot['admission'])->toBe($award->admission_snapshot);
+    $this->suppliers[0]->update(['name' => 'Alteração posterior à emissão']);
+    $this->actingAs($this->buyer)->post('/adjudicacoes/'.$award->id.'/emitir')->assertSessionHasNoErrors();
+    expect(PurchaseOrder::query()->count())->toBe(1)->and($order->refresh()->snapshot['supplier']['name'])->toBe('Fornecedor 0');
+    $this->post('/requisicoes/'.$this->r->id.'/admissao/adoptar', ['policy_id' => 1, 'previous_id' => 1, 'reason' => 'Tentativa após a emissão'])->assertSessionHasErrors('admission');
+});
+
+test('formal exclusions cannot enter selection and minimum three eligible suppliers remains', function () {
+    prepareFormalAwardAdmission($this);
+    $workflow = app(FormalAdmission::class);
+    $adoption = $workflow->adoption($this->r);
+    $previous = AdmissionDecision::query()->where('quotation_id', $this->quotes[0]->id)->latest('id')->firstOrFail();
+    $decision = $workflow->propose($this->buyer, $this->r, ['quotation_id' => $this->quotes[0]->id, 'previous_id' => $previous->id, 'basis_hash' => $previous->basis_hash, 'outcome' => 'exclude', 'reason' => 'Exclusão fictícia fundamentada']);
+    foreach ([$this->finance, $this->head] as $reviewer) {
+        $this->actingAs($reviewer);
+        $workflow->review($reviewer, $decision, 'approved', 'Conferência de exclusão fictícia');
+    }
+    expect($workflow->status($decision, $adoption))->toBe('confirmed')->and(app(ProposalComparison::class)->inspect($this->r)['ready'])->toBeFalse();
+    $this->actingAs($this->buyer)->post($this->awardUrl, $this->selection)->assertSessionHasErrors();
+    expect(PurchaseAward::query()->count())->toBe(0)->and(BudgetEntry::query()->count())->toBe(0);
+});
+
+test('admission basis changes block emission and existing legacy award cannot adopt retroactively', function () {
+    prepareFormalAwardAdmission($this);
+    $award = selectPurchaseAward($this);
+    approvePurchaseAward($this, $award);
+    $this->suppliers[0]->update(['name' => 'Nome alterado antes de emitir']);
+    $this->actingAs($this->buyer)->post('/adjudicacoes/'.$award->id.'/emitir')->assertSessionHasErrors();
+    expect(PurchaseOrder::query()->count())->toBe(0);
+});
+
+test('legacy award keeps null admission basis and refuses later adoption', function () {
+    $award = selectPurchaseAward($this);
+    expect($award->admission_snapshot)->toBeNull();
+    $this->actingAs($this->admin);
+    $policy = app(FormalAdmission::class)->policy($this->admin, ['previous_id' => 0, 'enabled' => true, 'roles' => ['finance'], 'required_count' => 1, 'reason' => 'Política fictícia posterior']);
+    $this->actingAs($this->buyer)->post('/requisicoes/'.$this->r->id.'/admissao/adoptar', ['policy_id' => $policy->id, 'previous_id' => 0, 'reason' => 'Adopção retroactiva impedida'])->assertSessionHasErrors('admission');
+    expect(AdmissionAdoption::query()->count())->toBe(0);
+    issuePurchaseOrder($this, $award);
+});
diff --git a/tests/Feature/PurchaseProcessTest.php b/tests/Feature/PurchaseProcessTest.php
index 3bca1b3..25ec748 100644
--- a/tests/Feature/PurchaseProcessTest.php
+++ b/tests/Feature/PurchaseProcessTest.php
@@ -21,7 +21,7 @@ test('process overview links records without declaring partial execution complet
             ->where('stages.7.state', 'recorded')
             ->where('stages.7.detail', '1 registadas; 0 validadas. O registo não equivale a validação.')
             ->where('stages.8.state', 'not_started')
-            ->has('future', 2)
+            ->has('future', 1)
             ->where('documents', fn ($documents) => collect($documents)->contains('label', $f['invoice']->number)));
 });
 
diff --git a/tests/Support/AdmissionFixture.php b/tests/Support/AdmissionFixture.php
new file mode 100644
index 0000000..402065b
--- /dev/null
+++ b/tests/Support/AdmissionFixture.php
@@ -0,0 +1,31 @@
+<?php
+
+use App\Enums\PurchasingRole;
+use App\Models\User;
+use App\Services\DocumentaryQualificationWorkflow;
+use App\Services\FormalAdmission;
+
+require_once __DIR__.'/QualificationFixture.php';
+
+/** Synthetic data only; the underlying fixture enforces an isolated database. */
+function admissionFixture(int $quorum = 2): array
+{
+    $f = qualificationFixture();
+    $admin = User::factory()->create(['tenant_id' => $f['tenant']->id, 'purchasing_role' => PurchasingRole::Admin]);
+    $buyer = User::factory()->create(['tenant_id' => $f['tenant']->id, 'purchasing_role' => PurchasingRole::Procurement]);
+    auth()->guard()->setUser($f['issuer']);
+    $set = app(DocumentaryQualificationWorkflow::class)->define($f['issuer'], $f['r'], $f['definition']);
+    $assessment = $f['assessment'];
+    $assessment['answers'][1] = ['criterion_id' => 2, 'result' => 'met', 'evidence' => 'Referência fictícia 2', 'reason' => 'Conformidade conferida em teste isolado'];
+    auth()->guard()->setUser($f['analyst']);
+    $record = app(DocumentaryQualificationWorkflow::class)->assess($f['analyst'], $set, $assessment);
+    $workflow = app(FormalAdmission::class);
+    $policyData = ['previous_id' => 0, 'enabled' => true, 'roles' => ['finance'], 'required_count' => $quorum, 'reason' => 'Configuração exclusivamente fictícia'];
+    auth()->guard()->setUser($admin);
+    $policy = $workflow->policy($admin, $policyData);
+    auth()->guard()->setUser($buyer);
+    $adoption = $workflow->adopt($buyer, $f['r'], $policy->id, 0, 'Adopção exclusivamente fictícia');
+    $proposal = ['quotation_id' => $f['quote']->id, 'previous_id' => 0, 'basis_hash' => $workflow->basis($f['r'], $f['quote']->id)['hash'], 'outcome' => 'admit', 'reason' => 'Proposta exclusivamente fictícia'];
+
+    return [...$f, 'admin' => $admin, 'buyer' => $buyer, 'set' => $set, 'record' => $record, 'assessment' => $assessment, 'policy' => $policy, 'policy_data' => $policyData, 'adoption' => $adoption, 'proposal' => $proposal];
+}
diff --git a/tests/Support/apply-admission-migration.php b/tests/Support/apply-admission-migration.php
new file mode 100644
index 0000000..3fbe6dd
--- /dev/null
+++ b/tests/Support/apply-admission-migration.php
@@ -0,0 +1,111 @@
+<?php
+
+// Explicit operational entry point: backup, restore verification, then only migration 000019.
+use Illuminate\Contracts\Console\Kernel;
+use Illuminate\Support\Facades\Artisan;
+use Illuminate\Support\Facades\DB;
+use Symfony\Component\Process\Process;
+
+require __DIR__.'/../../vendor/autoload.php';
+$app = require __DIR__.'/../../bootstrap/app.php';
+$app->make(Kernel::class)->bootstrap();
+$connection = DB::connection();
+if ($connection->getDriverName() !== 'pgsql' || $connection->getDatabaseName() !== 'compras_dev' || ! $app->environment('local')) {
+    throw new LogicException('Aplicação recusada fora de compras_dev/local.');
+}
+$pdo = $connection->getPdo();
+$migration = '2026_10_28_000019_create_formal_admission';
+if ($pdo->query("SELECT count(*) FROM migrations WHERE migration = '$migration'")->fetchColumn() > 0) {
+    throw new LogicException('Migração já aplicada; não repetir.');
+}
+$config = $connection->getConfig();
+$bin = 'C:/Program Files/PostgreSQL/17/bin/';
+foreach (['pg_dump.exe', 'pg_restore.exe'] as $tool) {
+    if (! is_file($bin.$tool)) {
+        throw new LogicException('Ferramentas PostgreSQL 17 ausentes.');
+    }
+}
+$envHash = hash_file('sha256', base_path('.env'));
+$directory = storage_path('app/private/backups/formal-admission-000019-'.gmdate('Ymd-His').'-'.bin2hex(random_bytes(3)));
+if (! mkdir($directory, 0700, true)) {
+    throw new RuntimeException('Não foi possível criar backup privado.');
+}
+$env = ['PGHOST' => $config['host'], 'PGPORT' => (string) $config['port'], 'PGUSER' => $config['username'], 'PGPASSWORD' => $config['password'], 'PGSSLMODE' => $config['sslmode'] ?? 'prefer'];
+$quote = fn (string $name) => '"'.str_replace('"', '""', $name).'"';
+$columns = [];
+$fingerprints = function (PDO $db, array $tables) use ($quote, &$columns): array {
+    $result = [];
+    foreach ($tables as $table) {
+        $rows = $db->query('SELECT md5(row_to_json(t)::text) FROM (SELECT '.implode(', ', array_map($quote, $columns[$table])).' FROM public.'.$quote($table).') t')->fetchAll(PDO::FETCH_COLUMN);
+        sort($rows, SORT_STRING);
+        $result[$table] = ['count' => count($rows), 'sha256' => hash('sha256', implode('\n', $rows))];
+    }
+
+    return $result;
+};
+$tables = $pdo->query("SELECT tablename FROM pg_tables WHERE schemaname = 'public' ORDER BY tablename")->fetchAll(PDO::FETCH_COLUMN);
+foreach ($tables as $table) {
+    $statement = $pdo->prepare("SELECT column_name FROM information_schema.columns WHERE table_schema = 'public' AND table_name = ? ORDER BY ordinal_position");
+    $statement->execute([$table]);
+    $columns[$table] = $statement->fetchAll(PDO::FETCH_COLUMN);
+}
+$restoreDatabase = 'compras_restore_check_'.bin2hex(random_bytes(6));
+$restoreCreated = false;
+try {
+    // pg_dump and the manifest read exactly the same committed snapshot.
+    $pdo->beginTransaction();
+    $pdo->exec('SET TRANSACTION ISOLATION LEVEL REPEATABLE READ, READ ONLY');
+    $snapshot = $pdo->query('SELECT pg_export_snapshot()')->fetchColumn();
+    $backupState = $fingerprints($pdo, $tables);
+    $dump = new Process([$bin.'pg_dump.exe', '--format=custom', '--no-owner', '--no-acl', '--snapshot='.$snapshot, '--file='.$directory.'/database.dump', '--dbname='.$config['database']], base_path(), $env);
+    $dump->setTimeout(120);
+    $dump->run();
+    if (! $dump->isSuccessful()) {
+        throw new RuntimeException('Falha no backup PostgreSQL; migração não executada.');
+    }
+    $pdo->commit();
+    $pdo->exec('CREATE DATABASE '.$quote($restoreDatabase));
+    $restoreCreated = true;
+    $restore = new Process([$bin.'pg_restore.exe', '--exit-on-error', '--no-owner', '--no-acl', '--dbname='.$restoreDatabase, $directory.'/database.dump'], base_path(), $env);
+    $restore->setTimeout(120);
+    $restore->run();
+    if (! $restore->isSuccessful()) {
+        throw new RuntimeException('Restauro de verificação falhou; migração não executada.');
+    }
+    config(['database.connections.budget_restore' => [...$config, 'url' => null, 'database' => $restoreDatabase]]);
+    $restored = DB::connection('budget_restore')->getPdo();
+    if ($fingerprints($restored, $tables) !== $backupState) {
+        throw new RuntimeException('Restauro não corresponde ao backup; migração recusada.');
+    }
+    file_put_contents($directory.'/manifest.json', json_encode(['tables' => $backupState, 'columns' => $columns, 'dump_sha256' => hash_file('sha256', $directory.'/database.dump')], JSON_PRETTY_PRINT | JSON_THROW_ON_ERROR));
+    file_put_contents($directory.'/RECUPERACAO.txt', "Backup custom PostgreSQL 17 verificado por restauro numa base separada.\nUsar pg_restore --exit-on-error --no-owner --no-acl --dbname=NOVA_BASE database.dump.\nAs credenciais pertencem ao ambiente local e não estão neste manifesto.\nNão restaurar por cima da base existente.\n");
+    DB::disconnect('budget_restore');
+    unset($restored);
+    $pdo->exec('DROP DATABASE '.$quote($restoreDatabase));
+    $restoreCreated = false;
+    $businessTables = array_values(array_diff($tables, ['migrations', 'sessions', 'cache', 'cache_locks', 'jobs', 'failed_jobs', 'job_batches']));
+    $before = $fingerprints($pdo, $businessTables);
+    $oldMigrations = $pdo->query('SELECT id, migration, batch FROM migrations ORDER BY id')->fetchAll(PDO::FETCH_ASSOC);
+    $constraints = $pdo->query("SELECT conname, pg_get_constraintdef(oid) AS definition FROM pg_constraint WHERE connamespace = 'public'::regnamespace ORDER BY conname, definition")->fetchAll(PDO::FETCH_ASSOC);
+    $exit = Artisan::call('migrate', ['--path' => 'database/migrations/'.$migration.'.php', '--force' => true]);
+    if ($exit !== 0) {
+        throw new RuntimeException('Migração falhou; consultar backup privado.');
+    }
+    $after = $fingerprints($pdo, $businessTables);
+    $newMigrations = $pdo->query('SELECT id, migration, batch FROM migrations ORDER BY id')->fetchAll(PDO::FETCH_ASSOC);
+    $newConstraints = $pdo->query("SELECT conname, pg_get_constraintdef(oid) AS definition FROM pg_constraint WHERE connamespace = 'public'::regnamespace ORDER BY conname, definition")->fetchAll(PDO::FETCH_ASSOC);
+    if ($before !== $after || array_slice($newMigrations, 0, count($oldMigrations)) !== $oldMigrations || count($newMigrations) !== count($oldMigrations) + 1 || array_diff(array_map('serialize', $constraints), array_map('serialize', $newConstraints)) !== [] || hash_file('sha256', base_path('.env')) !== $envHash) {
+        throw new RuntimeException('Verificação de preservação falhou; não executar mais escritas.');
+    }
+    $report = ['verified_at_utc' => gmdate('c'), 'migration' => $migration, 'batch' => (int) end($newMigrations)['batch'], 'backup_created' => true, 'backup_bytes' => filesize($directory.'/database.dump'), 'restore_verified' => true, 'restored_tables' => count($tables), 'restore_database_dropped' => true, 'business_records_unchanged' => true, 'existing_constraints_preserved' => true, 'env_unchanged' => true, 'admission_policies_count' => (int) $pdo->query('SELECT count(*) FROM admission_policies')->fetchColumn(), 'admission_adoptions_count' => (int) $pdo->query('SELECT count(*) FROM admission_adoptions')->fetchColumn(), 'operational_validation' => false];
+    file_put_contents(base_path('docs/admissao-migracao-000019.json'), json_encode($report, JSON_PRETTY_PRINT | JSON_THROW_ON_ERROR).PHP_EOL);
+    echo json_encode($report, JSON_PRETTY_PRINT | JSON_THROW_ON_ERROR).PHP_EOL;
+} finally {
+    if ($pdo->inTransaction()) {
+        $pdo->rollBack();
+    }
+    DB::disconnect('budget_restore');
+    if ($restoreCreated && preg_match('/^compras_restore_check_[a-f0-9]{12}$/', $restoreDatabase) && $restoreDatabase !== $connection->getDatabaseName()) {
+        $pdo->exec('DROP DATABASE '.$quote($restoreDatabase));
+    }
+}