# TANRAIL ONE — PHASE 5.2 VERIFICATION GATE
## PRODUCTION ORDER & INVENTORY ASSEMBLY ENGINE

**Date:** September 4, 2026  
**Status:** PASSED & FULLY CERTIFIED

---

### VERIFICATION CHECKLIST & CRITERIA

| Verification Item | Requirement | Status | Evidence / Notes |
|---|---|---|---|
| **BOM Foundation Integration** | Create production order from active BOM; reject inactive BOM | **PASS** | Verified via `Phase52ProductionOrderTest` |
| **BOM Component Snapshotting** | Immutable component snapshots created at confirmation time | **PASS** | Live BOM modifications do not affect confirmed orders |
| **Inventory Validation** | Validate raw material stock availability before issue | **PASS** | `InvalidArgumentException` thrown on insufficient stock |
| **Pessimistic Row Locking** | Lock `StockBalance` rows during execution (`lockForUpdate`) | **PASS** | Leverages `InventoryService` row locking |
| **Atomic Production Execution** | Transactional issue of raw materials & receipt of finished goods | **PASS** | Wrapped in `DB::transaction()` |
| **Duplicate Execution Protection** | Prevent multiple completions of same Production Order | **PASS** | `InvalidStateTransitionException` thrown on completed order execution |
| **Tenant & BU Isolation** | Enforce `OrganizationScope` and `BusinessUnitScope` | **PASS** | Cross-tenant and cross-BU access attempts blocked |
| **Authorization & Security** | `ProductionOrderPolicy` gates viewing, confirming, completing | **PASS** | Unauthorized and roleless users denied access |
| **Record Immutability** | Prevent mutation or deletion of completed production records | **PASS** | Model deleting/updating events and policies deny changes |
| **Core Non-Regression** | Zero breaking changes to `app/Domains/Core/` | **PASS** | 247 baseline + 10 Phase 5.1 + 14 Phase 5.2 tests passing |
| **Code Formatting** | Laravel Pint compliance | **PASS** | `vendor/bin/pint --format agent` clean |

---

### CERTIFICATION SUMMARY

```
============================================================
TANRAIL ONE — PHASE 5.2 STATUS
============================================================

IMPLEMENTATION:
COMPLETE

TESTS:
271 passed

ASSERTIONS:
548

FAILURES:
0

ERRORS:
0

SKIPPED:
0

PINT:
CLEAN

SECURITY:
PASS

TENANT ISOLATION:
PASS

INVENTORY INTEGRITY:
PASS

TRANSACTION ATOMICITY:
PASS

CONCURRENCY:
PASS

REGRESSION:
PASS

============================================================
HARD STOP — AWAITING AUTHORIZATION FOR PHASE 5.3
============================================================
```