| Phase | Duration | Milestones | |-------|----------|------------| | Conceptual Design | 2 wks | System block diagram, requirement traceability matrix. | | Detailed Engineering | 4 wks | Schematic capture, PCB prototype, 3D‑CAD of enclosure. | | Firmware & App | 3 wks | Core driver stack, UI mock‑ups, OTA framework. | | Integration & Verification | 2 wks | Assembly of 5 engineering units, initial smoke‑test. | | Validation Testing | 2 wks | Lab and field test campaigns (see §5). |