| Business need / objective | Stakeholder req. | Solution req. | Design / build | Test case | Status |
|---|---|---|---|---|---|
| Cut line defects 50% | Operator alert on fault | FR-12 fault alarm <2s | PLC module M4 | TC-12 | Verified |
| Cut line defects 50% | Trace each reject | FR-15 log reject + cause | MES report R7 | TC-15 | Implemented |
Forward tracing = need → requirement → build → test (coverage). Backward tracing = test/feature → originating need (no orphans, no gold-plating). The RTM is the backbone for impact analysis & scope control.