System Requirements Specification (SyRS) — ISO/IEC/IEEE 15289 — Specification | IEEE 29148 §6.2–6.4
Generated 2026-03-27 — UHT Journal / universalhex.org
| Standard | Title |
|---|---|
| EN 12101 | — |
| EN 12464-1 | — |
| EN 13637 | — |
| EN 13849-1 | — |
| EN 54 | — |
| EN 54-16 | — |
| EN 54-compliant | — |
| EN 60839 | — |
| EN 81-31 | — |
| IEC 61508 | Functional safety of electrical/electronic/programmable electronic safety-related systems |
| IEC 62443 | Industrial communication networks — Network and system security |
| IEC 62443-3-3 | System security requirements and security levels |
| IMDG segregation tables is a legal obligation for warehouses handling mixed inventory including batteries | — |
| ISO 10218-2 | — |
| ISO 13849 | — |
| ISO 13855 | — |
| ISO 3691-4 | — |
| ISO 9409-1 | — |
| NFPA 30A | — |
| Acronym | Expansion |
|---|---|
| ARC | Architecture Decisions |
| CCCS | Completeness, Consistency, Correctness, Stability |
| EARS | Easy Approach to Requirements Syntax |
| IFC | Interface Requirements |
| STK | Stakeholder Requirements |
| SUB | Subsystem Requirements |
| SYS | System Requirements |
| UHT | Universal Hex Taxonomy |
| VER | Verification Plan |
| Ref | Requirement | V&V | Tags |
|---|---|---|---|
| STK-NEEDS-001 | The Automated Warehouse SHALL process a minimum of 50,000 order lines per hour during peak operating periods. Rationale: Derived from projected peak retail demand of 500,000 daily orders with 60% concentrated in a 6-hour window. The 50,000 lines/hr throughput target ensures the facility clears daily order backlog without overnight overflow, which would cascade into next-day SLA violations. | Test | stakeholder, session-242 |
| STK-NEEDS-002 | The Automated Warehouse SHALL achieve operational availability of at least 99.5% measured over any rolling 30-day period, excluding planned maintenance windows. Rationale: Supply chain SLA requires next-day fulfilment for 98% of orders. At 99.5% availability, expected downtime is 3.6 hours/month, absorbable within planned maintenance windows. Below 99.0%, order backlog accumulation exceeds surge capacity and triggers contractual penalties. | Analysis | stakeholder, session-242 |
| STK-NEEDS-003 | The Automated Warehouse SHALL ensure zero lost-time injuries to personnel operating within or adjacent to automated zones. Rationale: Regulatory requirement under UK Health and Safety at Work Act 1974 and PUWER 1998. Automated zones present crushing, trapping, and collision hazards from cranes, robots, and conveyors that must be engineered out through safeguarding. | Inspection | stakeholder, safety, session-242 |
| STK-NEEDS-004 | The Automated Warehouse SHALL maintain inventory accuracy of at least 99.95% at SKU-location level, verified by cyclic counting. Rationale: Below 99.9% accuracy, picker misdirects exceed 50/day causing cascading pick failures and customer complaints. The 99.95% target limits misdirects to approximately 5/day for a 100K SKU facility, manageable through exception handling. | Test | stakeholder, session-242 |
| STK-NEEDS-005 | The Automated Warehouse SHALL achieve order accuracy of at least 99.9% defined as correct items, correct quantities, and correct packaging for each shipped order. Rationale: Customer-facing SLA requires less than 1 error per 1,000 orders. Each mispick costs approximately GBP 15 in return processing and reshipment. At 50,000 lines/hr peak, even 0.1% error rate yields 50 errors/hr. | Test | stakeholder, session-242 |
| STK-NEEDS-006 | The Automated Warehouse SHALL support a 50% increase in throughput capacity through modular expansion without requiring shutdown of existing operations. Rationale: Business growth projection anticipates 50% throughput increase within 5 years. Retrofitting a non-modular facility requires 6+ month shutdown costing estimated GBP 2M/week in lost fulfilment revenue. Modular design avoids this. | Demonstration | stakeholder, session-242 |
| STK-NEEDS-007 | The Automated Warehouse SHALL maintain cold-chain integrity for chilled goods at 2C to 8C from receiving dock to dispatch, with continuous temperature logging. Rationale: Pharmaceutical and perishable food products require 2-8C storage per EU GDP guidelines and UK food safety regulations. Breach of cold chain renders product unsaleable and creates regulatory liability. | Test | stakeholder, cold-chain, session-242 |
| STK-NEEDS-008 | The Automated Warehouse SHALL segregate hazardous materials in dedicated storage zones compliant with DSEAR 2002 and ADR regulations, with automated enforcement preventing co-storage of incompatible goods. Rationale: Legal requirement under Dangerous Substances and Explosive Atmospheres Regulations 2002 (DSEAR) and ADR transport classification. Co-storage of incompatible materials creates explosion and toxic release risk. | Inspection | stakeholder, safety, hazmat, session-242 |
| STK-NEEDS-009 | The Automated Warehouse SHALL provide safe maintenance access to all automated equipment without requiring full system shutdown, using zone-based isolation that permits continued operation of unaffected zones. Rationale: Full system shutdown for single-subsystem maintenance reduces facility throughput to zero, unacceptable for 24/7 operation. Zone isolation permits concurrent maintenance and operations, limiting throughput impact to the affected zone. | Demonstration | stakeholder, maintenance, session-242 |
| STK-NEEDS-010 | The Automated Warehouse SHALL consume no more than 0.15 kWh per order line fulfilled, measured as total facility energy divided by order lines shipped over a rolling 7-day period. Rationale: Energy cost is the second-largest operational expense after labour. At 50,000 lines/hr, 0.15 kWh/line yields 7,500 kWh/hr peak demand, aligning with industry benchmarks for automated distribution centres and corporate sustainability commitments. | Analysis | stakeholder, energy, session-242 |
| Ref | Requirement | V&V | Tags |
|---|---|---|---|
| SYS-REQS-001 | The Automated Storage and Retrieval System SHALL retrieve a minimum of 1,200 unit loads per hour from storage to I/O conveyor stations. Rationale: Derived from 50,000 order lines/hr peak with average 4.2 lines per tote and 10% buffer. AS/RS must feed downstream picking without becoming the bottleneck. At 1,200 loads/hr across 6 aisles, each crane operates at 200 cycles/hr within manufacturer-rated capacity for mini-load systems. | Test | system, asrs, session-242 |
| SYS-REQS-002 | The Autonomous Mobile Robot Fleet SHALL transport a minimum of 3,000 totes per hour between storage I/O stations and pick/pack stations. Rationale: AMR fleet must transport totes from AS/RS I/O stations to 40 pick stations at peak rate. With 1.5-minute average round trip and 80% utilisation, approximately 75 AMRs achieve 3,000 totes/hr, providing 20% headroom above 2,500 totes/hr minimum. | Test | system, amr, session-242 |
| SYS-REQS-003 | The Warehouse Management System SHALL process an order from receipt to dispatch-ready status within 45 minutes for standard orders during peak throughput. Rationale: Same-day dispatch cutoff requires orders received by 15:00 to be dispatch-ready by 18:00. At peak order volume, 45 minutes per order ensures the 3-hour afternoon surge window clears without overflow. | Test | system, wms, session-242 |
| SYS-REQS-004 | The Automated Warehouse SHALL achieve a system-level mean time between failures of at least 200 hours, where failure is defined as any event reducing throughput below 70% of rated capacity. Rationale: MTBF of 200 hours equates to one throughput-reducing failure per 8 days. Combined with target 2-hour MTTR, this yields 99.5% availability per STK-NEEDS-002. Lower MTBF would require faster repair or higher redundancy. | Analysis | system, reliability, session-242 |
| SYS-REQS-005 | When an emergency stop is activated in any zone, the Automated Warehouse SHALL bring all moving equipment in that zone to a safe state within 500 milliseconds while maintaining operation in unaffected zones. Rationale: 500ms e-stop response ensures equipment at maximum speed (crane 4m/s, AMR 2m/s) travels no more than 2m after activation, within safety clearance zones mandated by ISO 13849 PL d for Category 3 safety systems. | Test | system, safety, session-242 |
| SYS-REQS-006 | The Automated Warehouse SHALL detect personnel entering automated zones within 200 milliseconds and reduce equipment speed to collaborative limits (250mm/s for robots, conveyor stop) before the person reaches the equipment safety envelope. Rationale: 200ms detection plus 300ms speed-reduction actuation (total 500ms) ensures a person at 1.5m/s is detected and equipment slowed before closing the 2m safety envelope, per ISO 13855 safety distance calculations. | Test | system, safety, session-242 |
| SYS-REQS-007 | The Warehouse Management System SHALL track every SKU movement with barcode or RFID verification at each transfer point, achieving 99.95% location accuracy without manual cycle counts. Rationale: Mirrors STK-NEEDS-004 inventory accuracy. Barcode/RFID verification at each transfer point provides closed-loop tracking eliminating cumulative location drift. Without per-transfer verification, accuracy degrades to 99% within 48 hours. | Test | system, wms, inventory, session-242 |
| SYS-REQS-008 | The Robotic Picking System SHALL achieve a pick accuracy of at least 99.95% defined as correct item selected from source tote and placed in correct order tote. Rationale: Pick accuracy must exceed system order accuracy target (99.9%) because downstream packaging adds its own error rate. At 99.95% pick and 99.95% pack verification, combined accuracy exceeds 99.9% per STK-NEEDS-005. | Test | system, picking, session-242 |
| SYS-REQS-009 | While chilled goods are stored or in transit within the warehouse, the Building Management and Safety System SHALL maintain ambient temperature in chilled zones between 2C and 8C with temperature logged at 5-minute intervals. Rationale: Derived from STK-NEEDS-007 cold chain requirement. 5-minute logging interval is maximum permitted by EU GDP Chapter 9 for temperature-sensitive pharmaceutical storage. BMSS must maintain zone temperature independently of warehouse ambient. | Test | system, cold-chain, session-242 |
| SYS-REQS-010 | The Warehouse Management System SHALL automatically reject storage assignments that would place incompatible hazardous materials within the same storage zone, referencing a configurable compatibility matrix aligned with ADR classification. Rationale: Automates DSEAR/ADR compliance from STK-NEEDS-008 at WMS assignment level rather than relying on operator judgement. Configurable matrix allows updates for new product categories without software changes. | Test | system, hazmat, safety, session-242 |
| SYS-REQS-011 | The Automated Warehouse SHALL support zone-based equipment isolation permitting maintenance personnel to lock out any single AS/RS aisle, conveyor zone, or AMR charging area while the remainder of the system continues operating at no less than 85% of rated throughput. Rationale: 85% residual throughput during single-zone isolation derives from 8-subsystem architecture where each zone is 12-15% of capacity. Loss of one zone reduces capacity by 12-15%, leaving 85-88% available. | Demonstration | system, maintenance, session-242 |
| SYS-REQS-012 | The Automated Warehouse SHALL consume no more than 7,500 kWh total facility energy per hour at peak throughput of 50,000 order lines per hour. Rationale: Direct derivation: STK-NEEDS-010 (0.15 kWh/line) x 50,000 lines/hr = 7,500 kWh/hr. This bounds electrical supply infrastructure sizing at minimum 7.5MW with 10% headroom, and cooling capacity. | Analysis | system, energy, session-242 |
| SYS-REQS-013 | When smoke or heat is detected in any high-rack storage aisle, the Building Management and Safety System SHALL activate in-rack sprinklers in the affected zone within 60 seconds of detection and halt all AS/RS crane movement in that aisle within 10 seconds of detection. Rationale: In-rack sprinkler activation within 60s limits fire to single rack bay per FM Global DS 8-34. 10-second crane halt prevents crane from transporting burning materials to adjacent bays, which would spread fire along the aisle. | Test | system, safety, fire, session-242 |
| SYS-REQS-014 | The Material Handling Conveyor System SHALL sort a minimum of 12,000 items per hour to 60 shipping lanes with a mis-sort rate of no more than 0.01%. Rationale: 12,000 items/hr to 60 lanes supports peak dispatch with carrier-specific sorting. 0.01% mis-sort rate (1.2 items/hr) prevents carrier-level shipping errors costing GBP 50+ per mis-routed parcel in return logistics. | Test | system, conveyor, session-242 |
| SYS-REQS-015 | The Automated Warehouse SHALL support addition of AS/RS aisles, AMR units, pick stations, and conveyor branches through standardised mechanical and data interfaces without requiring shutdown of existing equipment. Rationale: Implements STK-NEEDS-006 at system level. Standardised mechanical, power, and data interfaces ensure new aisles, robots, and stations integrate without custom engineering, reducing expansion lead time from months to weeks. | Demonstration | system, scalability, session-242 |
| SYS-REQS-020 | The Automated Warehouse SHALL implement network segmentation between IT and OT zones in accordance with IEC 62443-3-3 Security Level 2, with all inter-zone communications traversing a demilitarised zone employing application-layer firewalls, and no direct path from external networks to safety-rated control systems. | Inspection | system, cybersecurity, validation, session-250 |
| SYS-REQS-021 | The Automated Warehouse SHALL maintain uninterruptible power to all safety systems, WMS servers, and AS/RS control systems via redundant UPS with minimum 15-minute ride-through at full load, sufficient for controlled equipment shutdown and data persistence in the event of mains power loss. | Test | system, power, validation, session-250 |
| SYS-REQS-022 | The Warehouse Management System SHALL maintain a hot standby replica of the Inventory Database with synchronous replication and automatic failover within 30 seconds, and SHALL perform incremental backups of all operational data every 15 minutes to geographically separate storage with a recovery point objective of no more than 15 minutes. | Test | system, data-resilience, validation, session-250 |
| SYS-REQS-023 | The Automated Warehouse SHALL implement network segmentation between IT and OT zones in accordance with IEC 62443-3-3 Security Level 2, with all inter-zone communications traversing a demilitarised zone employing application-layer firewalls, and no direct path from external networks to safety-rated control systems. | Inspection | system, cybersecurity, validation, session-250 |
| SYS-REQS-024 | The Automated Warehouse SHALL maintain uninterruptible power to all safety systems, WMS servers, and AS/RS control systems via redundant UPS with minimum 15-minute ride-through at full load, sufficient for controlled equipment shutdown and data persistence in the event of mains power loss. | Test | system, power, validation, session-250 |
| SYS-REQS-025 | The Warehouse Management System SHALL maintain a hot standby replica of the Inventory Database with synchronous replication and automatic failover within 30 seconds, and SHALL perform incremental backups of all operational data every 15 minutes to geographically separate storage with a recovery point objective of no more than 15 minutes. | Test | system, data-resilience, validation, session-250 |
| Source | Target | Type | Description |
|---|---|---|---|
| STK-NEEDS-002 | SYS-019 | derives | |
| STK-NEEDS-004 | SYS-018 | derives | |
| STK-NEEDS-002 | SYS-018 | derives | |
| STK-NEEDS-002 | SYS-017 | derives | |
| STK-NEEDS-003 | SYS-016 | derives | |
| STK-NEEDS-002 | SYS-016 | derives | |
| STK-NEEDS-006 | SYS-REQS-015 | derives | |
| STK-NEEDS-001 | SYS-REQS-014 | derives | |
| STK-NEEDS-003 | SYS-REQS-013 | derives | |
| STK-NEEDS-010 | SYS-REQS-012 | derives | |
| STK-NEEDS-009 | SYS-REQS-011 | derives | |
| STK-NEEDS-008 | SYS-REQS-010 | derives | |
| STK-NEEDS-007 | SYS-REQS-009 | derives | |
| STK-NEEDS-005 | SYS-REQS-008 | derives | |
| STK-NEEDS-004 | SYS-REQS-007 | derives | |
| STK-NEEDS-003 | SYS-REQS-006 | derives | |
| STK-NEEDS-003 | SYS-REQS-005 | derives | |
| STK-NEEDS-002 | SYS-REQS-004 | derives | |
| STK-NEEDS-001 | SYS-REQS-003 | derives | |
| STK-NEEDS-001 | SYS-REQS-002 | derives | |
| STK-NEEDS-001 | SYS-REQS-001 | derives |