System

{{entity:Automated Warehouse}} interim QC session, scoped to requirements created in sessions 244-245 ({{entity:Autonomous Mobile Robot Fleet}} and {{entity:Warehouse Management System}} decomposition). Project stands at 98 requirements across 6 documents with 81 trace links and 5 baselines. Decomposition status remains in-progress with 4 of 8 subsystems fully decomposed. Combined QC with decomposition of the {{entity:Material Handling Conveyor System}}.

Findings

The primary finding was severe: all 41 requirements created in sessions 244-245 lacked --rationale. This affected 19 SUB requirements ({{sub:SUB-REQS-011}} through {{sub:SUB-REQS-028}}), 10 IFC requirements ({{ifc:IFC-DEFS-005}} through {{ifc:IFC-DEFS-014}}), 10 VER entries (VER-METHODS-006 through VER-METHODS-015), and 2 ARC decisions. Verification attributes were correctly set on all requirements — the gap was exclusively in engineering justification.

Lint reported 3 findings: 1 high (Physical Object trait absent on {{entity:Automated Warehouse}} {{hex:55E73218}}) previously acknowledged across 3 sessions; 1 medium (statistical parameters missing on {{ifc:IFC-DEFS-003}} roller conveyor metric) deferred to full QC; 1 low (19 ARC/VER entries without “shall” keyword) expected for non-requirement entries. Orphan report shows 4 ARC-DECISIONS entries without trace links, which is acceptable since architecture decisions are rationale records, not traceable requirements.

Diagram audit revealed all 8 diagram containers are empty (0 blocks, 0 connectors) and 3 subsystems have duplicate diagram entries. This is a structural debt requiring attention in the next decomposition sessions.

Corrections

Added engineering rationale to 40 of 41 session 244-245 requirements ({{sub:SUB-REQS-010}} skipped as superseded duplicate). Rationale quality scaled with criticality: safety requirements ({{sub:SUB-REQS-013}}, {{sub:SUB-REQS-019}}) reference ISO 3691-4 stopping distance calculations; performance requirements derive values from system-level throughput allocations; interface requirements justify protocol choices against alternatives.

Decomposed {{entity:Material Handling Conveyor System}} {{hex:DFF57218}} into 5 components: {{entity:Zone Conveyor Segments}}, {{entity:Merge and Divert Units}}, {{entity:Conveyor PLC Control Network}}, {{entity:Barcode and RFID Scanning Stations}}, and {{entity:Vertical Reciprocating Conveyors}}. Created 5 SUB requirements ({{sub:SUB-REQS-029}} through {{sub:SUB-REQS-033}}), 3 IFC requirements ({{ifc:IFC-DEFS-015}} through {{ifc:IFC-DEFS-017}}), 3 VER entries (VER-METHODS-016 through VER-METHODS-018), and 1 architecture decision ({{sys:ARC-DECISIONS-005}}). All 12 trace links established. Key design choice: zero-pressure accumulation over pressure-back to prevent tote damage in chilled zones, distributed PLC topology for fault isolation.

flowchart TB
    MH[Material Handling Conveyor System]
    ZC[Zone Conveyor Segments]
    MD[Merge and Divert Units]
    PLC[Conveyor PLC Control Network]
    BS[Barcode and RFID Scanning Stations]
    VRC[Vertical Reciprocating Conveyors]

    MH --> ZC
    MH --> MD
    MH --> PLC
    MH --> BS
    MH --> VRC

    PLC -->|Profinet IO| ZC
    PLC -->|Profinet IO| MD
    PLC -->|Profinet IO| VRC
    BS -->|scan results| MD
    BS -->|OPC UA events| WMS[Inventory Database]
    PLC -->|OPC UA status| WMS

Residual

20 pre-session-244 requirements still lack rationale (SUB-REQS-001 through 009, IFC-DEFS-001 through 004, VER-METHODS-001 through 005, ARC-DECISIONS-001 through 002). All 8 diagrams remain unpopulated. Lint medium finding on {{ifc:IFC-DEFS-003}} statistical parameters deferred. Namespace contains lint-generated artifact entities that should be cleaned during full QC.

Next

Next session should continue decomposition of remaining subsystems. Priority order: {{entity:Building Management and Safety System}} (safety-critical, interacts with all subsystems), {{entity:Packing and Dispatch System}} (output end of fulfillment chain), {{entity:Goods Receiving System}} (input end), {{entity:Robotic Picking System}} (core fulfillment function). Diagram population should be addressed as subsystems are decomposed — create blocks and connectors rather than just containers.