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# Combined Traceability Matrix
**Document ID:** TM-COMBINED
**Version:** 1.0
**Date:** 2025-02-01
## 1. Purpose
This document provides a comprehensive combined traceability matrix that links system requirements to software requirements, software features, and implementing components. This ensures complete end-to-end traceability from system-level needs to software implementation.
## 2. Combined Traceability Matrix
| System Requirement | Software Requirement | Software Feature | Implementing Component | Verification Method |
|-------------------|---------------------|------------------|----------------------|-------------------|
| **Sensor Data Acquisition** |
| SR-DAQ-001 | SWR-DAQ-001 | SF-DAQ | Sensor Manager | Unit Test |
| SR-DAQ-001 | SWR-DAQ-002 | SF-DAQ | Sensor Drivers | Integration Test |
| SR-DAQ-002 | SWR-DAQ-002 | SF-DAQ | Sensor Drivers | Integration Test |
| SR-DAQ-003 | SWR-DAQ-003 | SF-DAQ | Sensor Manager, Sensor Detector | Unit Test |
| SR-DAQ-004 | SWR-DAQ-004 | SF-DAQ | Sensor Manager | Unit Test |
| SR-DAQ-005 | SWR-DAQ-005 | SF-DAQ | Sensor Manager, Filter Engine | Unit Test |
| SR-DAQ-006 | SWR-DAQ-006 | SF-DAQ | Sensor Manager, Machine Constants Manager | Integration Test |
| SR-DAQ-007 | SWR-DAQ-007 | SF-DAQ | Sensor Manager, Time Service | Unit Test |
| SR-DAQ-008 | SWR-DAQ-008 | SF-DAQ | Sensor Manager | Unit Test |
| SR-DAQ-009 | SWR-DAQ-009 | SF-DAQ | Sensor Manager, Data Pool | Integration Test |
| SR-DAQ-010 | SWR-DAQ-010 | SF-DAQ | Sensor Manager | Performance Test |
| SR-DAQ-011 | SWR-DAQ-011 | SF-DAQ | Sensor Manager, Sensor State Machine | State Machine Test |
| SR-DAQ-012 | SWR-DAQ-012 | SF-DAQ | Sensor Manager | Unit Test |
| SR-DAQ-013 | SWR-DAQ-013 | SF-DAQ | Sensor Drivers, Sensor Manager | Integration Test |
| **Communication** |
| SR-COM-001 | SWR-COM-001 | SF-COM | Communication Manager, MQTT Client, TLS Handler | Integration Test |
| SR-COM-002 | SWR-COM-002 | SF-COM | Communication Manager, Main Hub APIs | Unit Test |
| SR-COM-003 | SWR-COM-003 | SF-COM | Communication Manager, Command Handler | Integration Test |
| SR-COM-004 | SWR-COM-004 | SF-COM | Communication Manager, Connection Monitor | Unit Test |
| SR-COM-005 | SWR-COM-005 | SF-COM | Communication Manager, Data Pool | Performance Test |
| SR-COM-006 | SWR-COM-006 | SF-COM | Communication Manager | Integration Test |
| SR-COM-007 | SWR-COM-007 | SF-COM | Communication Manager, Data Pool | Unit Test |
| SR-COM-008 | SWR-COM-008 | SF-COM | ESP-NOW Handler, Communication Manager | Unit Test |
| SR-COM-009 | SWR-COM-009 | SF-COM | ESP-NOW Handler | Integration Test |
| SR-COM-010 | SWR-COM-010 | SF-COM | Communication Manager | Unit Test |
| SR-COM-011 | SWR-COM-011 | SF-COM | Communication Manager, MQTT Client | Unit Test |
| SR-COM-012 | SWR-COM-012 | SF-COM | Communication Manager, Message Formatter | Unit Test |
| SR-COM-013 | SWR-COM-013 | SF-COM | Communication Manager, Connection Manager | Integration Test |
| SR-COM-014 | SWR-COM-014 | SF-COM | ESP-NOW Handler, Crypto Manager | Security Test |
| SR-COM-015 | SWR-COM-015 | SF-COM | ESP-NOW Handler | Unit Test |
| SR-COM-016 | SWR-COM-016 | SF-COM | Communication Manager | Integration Test |
| SR-COM-017 | SWR-COM-017 | SF-COM | Communication Manager | Unit Test |
| **Data Persistence** |
| SR-DATA-001 | SWR-DATA-001 | SF-DATA | Persistence Manager, Data Pool | Integration Test |
| SR-DATA-002 | SWR-DATA-002 | SF-DATA | Data Pool, Storage Abstraction | Unit Test |
| SR-DATA-003 | SWR-DATA-003 | SF-DATA | Persistence Manager, Configuration Manager | Unit Test |
| SR-DATA-004 | SWR-DATA-004 | SF-DATA | Data Pool, Storage Abstraction | Unit Test |
| SR-DATA-005 | SWR-DATA-005 | SF-DATA | Storage Abstraction, Access Control | Unit Test |
| SR-DATA-006 | SWR-DATA-006 | SF-DATA | Persistence Manager, Data Serializer | Unit Test |
| SR-DATA-007 | SWR-DATA-007 | SF-DATA | Persistence Manager, System State Manager | Integration Test |
| SR-DATA-008 | SWR-DATA-008 | SF-DATA | Persistence Manager, Data Integrity Checker | Unit Test |
| SR-DATA-009 | SWR-DATA-009 | SF-DATA | Storage Abstraction, Persistence Manager | Unit Test |
| SR-DATA-010 | SWR-DATA-010 | SF-DATA | Power Monitor, Brownout Detector | Hardware Test |
| SR-DATA-011 | SWR-DATA-011 | SF-DATA | Persistence Manager, Emergency Handler | Hardware Test |
| SR-DATA-012 | SWR-DATA-012 | SF-DATA | Persistence Manager, Fast Writer | Performance Test |
| SR-DATA-013 | SWR-DATA-013 | SF-DATA | Storage Abstraction, Wear Leveling Manager | Unit Test |
| **Diagnostics** |
| SR-DIAG-001 | SWR-DIAG-001 | SF-DIAG | Diagnostics Manager, Diagnostic Collector | Unit Test |
| SR-DIAG-002 | SWR-DIAG-002 | SF-DIAG | Diagnostic Collector, Code Registry | Unit Test |
| SR-DIAG-003 | SWR-DIAG-003 | SF-DIAG | Diagnostics Manager, Severity Classifier | Unit Test |
| SR-DIAG-004 | SWR-DIAG-004 | SF-DIAG | Diagnostic Collector, Time Service | Unit Test |
| SR-DIAG-005 | SWR-DIAG-005 | SF-DIAG | Diagnostic Logger, Persistence Manager | Integration Test |
| SR-DIAG-006 | SWR-DIAG-006 | SF-DIAG | Diagnostic Logger, Storage Abstraction | Unit Test |
| SR-DIAG-007 | SWR-DIAG-007 | SF-DIAG | Diagnostic Logger, Storage Manager | Unit Test |
| SR-DIAG-008 | SWR-DIAG-008 | SF-DIAG | Diagnostic Session, Session Manager | Integration Test |
| SR-DIAG-009 | SWR-DIAG-009 | SF-DIAG | Diagnostic Session, Diagnostic Logger | Unit Test |
| SR-DIAG-010 | SWR-DIAG-010 | SF-DIAG | Diagnostic Session, Diagnostic Logger | Unit Test |
| SR-DIAG-011 | SWR-DIAG-011 | SF-DIAG | Diagnostic Session, System Controller | Unit Test |
| SR-DIAG-012 | SWR-DIAG-012 | SF-DIAG | Watchdog Manager, Task Watchdog | Hardware Test |
| SR-DIAG-013 | SWR-DIAG-013 | SF-DIAG | Watchdog Manager, Interrupt Watchdog | Hardware Test |
| SR-DIAG-014 | SWR-DIAG-014 | SF-DIAG | Watchdog Manager, RTC Watchdog | Hardware Test |
| **System Management** |
| SR-SYS-001 | SWR-SYS-001 | SF-SYS | System State Manager, State Machine | Unit Test |
| SR-SYS-002 | SWR-SYS-002 | SF-SYS | System State Manager, Operation Controller | Unit Test |
| SR-SYS-003 | SWR-SYS-003 | SF-SYS | System State Manager, Event System | Integration Test |
| SR-SYS-004 | SWR-SYS-004 | SF-SYS | Teardown Manager, System State Manager | Integration Test |
| SR-SYS-005 | SWR-SYS-005 | SF-SYS | Teardown Manager, Persistence Manager | Unit Test |
| SR-SYS-006 | SWR-SYS-006 | SF-SYS | Teardown Manager, Data Integrity Manager | Unit Test |
| SR-SYS-007 | SWR-SYS-007 | SF-SYS | HMI Controller, OLED Driver | Hardware Test |
| SR-SYS-008 | SWR-SYS-008 | SF-SYS | HMI Controller, Display Manager | Integration Test |
| SR-SYS-009 | SWR-SYS-009 | SF-SYS | HMI Controller, Button Handler | Unit Test |
| SR-SYS-010 | SWR-SYS-010 | SF-SYS | Menu System, HMI Controller | Unit Test |
| SR-SYS-011 | SWR-SYS-011 | SF-SYS | Engineering Session, Diagnostic Session | Integration Test |
| SR-SYS-012 | SWR-SYS-012 | SF-SYS | Engineering Session, Debug Controller | Unit Test |
| SR-SYS-013 | SWR-SYS-013 | SF-SYS | Engineering Session, Security Manager | Security Test |
| SR-SYS-014 | SWR-SYS-014 | SF-SYS | GPIO Manager, Hardware Abstraction | Hardware Test |
| SR-SYS-015 | SWR-SYS-015 | SF-SYS | GPIO Manager, I2C Controller | Hardware Test |
| SR-SYS-016 | SWR-SYS-016 | SF-SYS | GPIO Manager, ADC Controller | Hardware Test |
| SR-SYS-017 | SWR-SYS-017 | SF-SYS | GPIO Manager, Documentation System | Documentation Review |
| **Data Quality & Calibration** |
| SR-DQC-001 | SWR-DQC-001 | SF-DQC | Sensor Detector, Hardware Interface | Hardware Test |
| SR-DQC-002 | SWR-DQC-002 | SF-DQC | Sensor Detector, System Controller | Unit Test |
| SR-DQC-003 | SWR-DQC-003 | SF-DQC | Sensor Manager, Sensor Detector | Integration Test |
| SR-DQC-004 | SWR-DQC-004 | SF-DQC | Sensor Type Enforcer, Configuration Manager | Unit Test |
| SR-DQC-005 | SWR-DQC-005 | SF-DQC | Sensor Type Enforcer, Sensor Validator | Unit Test |
| SR-DQC-006 | SWR-DQC-006 | SF-DQC | Sensor Type Enforcer, Diagnostics Manager | Integration Test |
| SR-DQC-007 | SWR-DQC-007 | SF-DQC | Sensor Failure Detector, Health Monitor | Unit Test |
| SR-DQC-008 | SWR-DQC-008 | SF-DQC | Sensor Failure Detector, Sensor Monitor | Unit Test |
| SR-DQC-009 | SWR-DQC-009 | SF-DQC | Sensor Manager, Sensor Failure Detector | Integration Test |
| SR-DQC-010 | SWR-DQC-010 | SF-DQC | Sensor Failure Detector, Communication Manager | Unit Test |
| SR-DQC-011 | SWR-DQC-011 | SF-DQC | Machine Constants Manager, Configuration Storage | Unit Test |
| SR-DQC-012 | SWR-DQC-012 | SF-DQC | Machine Constants Manager, Persistence Manager | Integration Test |
| SR-DQC-013 | SWR-DQC-013 | SF-DQC | Machine Constants Manager, System Controller | Unit Test |
| SR-DQC-014 | SWR-DQC-014 | SF-DQC | Machine Constants Manager, Communication Manager | Integration Test |
| SR-DQC-015 | SWR-DQC-015 | SF-DQC | Machine Constants Manager, Teardown Manager | Integration Test |
| SR-DQC-016 | SWR-DQC-016 | SF-DQC | Redundant Sensor Manager, Sensor Manager | Unit Test |
| SR-DQC-017 | SWR-DQC-017 | SF-DQC | Sensor Fusion Engine, Redundant Sensor Manager | Unit Test |
| SR-DQC-018 | SWR-DQC-018 | SF-DQC | Redundant Sensor Manager, Configuration Manager | Integration Test |
| **OTA** |
| SR-OTA-001 | SWR-OTA-001 | SF-OTA | Update Negotiator, OTA Manager | Integration Test |
| SR-OTA-002 | SWR-OTA-002 | SF-OTA | Update Negotiator, System State Manager | Unit Test |
| SR-OTA-003 | SWR-OTA-003 | SF-OTA | OTA Manager, Communication Manager | Unit Test |
| SR-OTA-004 | SWR-OTA-004 | SF-OTA | Firmware Receiver, Communication Manager | Integration Test |
| SR-OTA-005 | SWR-OTA-005 | SF-OTA | Firmware Storage, Storage Abstraction | Unit Test |
| SR-OTA-006 | SWR-OTA-006 | SF-OTA | Partition Manager, OTA Manager | Unit Test |
| SR-OTA-007 | SWR-OTA-007 | SF-OTA | Integrity Validator, Crypto Manager | Unit Test |
| SR-OTA-008 | SWR-OTA-008 | SF-OTA | Integrity Validator, OTA Manager | Security Test |
| SR-OTA-009 | SWR-OTA-009 | SF-OTA | OTA Manager, Communication Manager | Integration Test |
| SR-OTA-010 | SWR-OTA-010 | SF-OTA | Firmware Activator, Teardown Manager | Integration Test |
| SR-OTA-011 | SWR-OTA-011 | SF-OTA | Firmware Activator, Persistence Manager | Unit Test |
| SR-OTA-012 | SWR-OTA-012 | SF-OTA | Firmware Activator, Integrity Validator | Unit Test |
| SR-OTA-013 | SWR-OTA-013 | SF-OTA | Firmware Activator, Boot Controller | Integration Test |
| SR-OTA-014 | SWR-OTA-014 | SF-OTA | Partition Manager, Boot Controller | Hardware Test |
| SR-OTA-015 | SWR-OTA-015 | SF-OTA | Rollback Manager, Partition Manager | Integration Test |
| SR-OTA-016 | SWR-OTA-016 | SF-OTA | Rollback Manager, Communication Manager | Unit Test |
| **Security** |
| SR-SEC-001 | SWR-SEC-001 | SF-SEC | Secure Boot Controller, Boot Validator | Hardware Test |
| SR-SEC-002 | SWR-SEC-002 | SF-SEC | Secure Boot Controller, Security Manager | Security Test |
| SR-SEC-003 | SWR-SEC-003 | SF-SEC | Security Manager, System State Manager | Unit Test |
| SR-SEC-004 | SWR-SEC-004 | SF-SEC | eFuse Manager, Hardware Security Module | Hardware Test |
| SR-SEC-005 | SWR-SEC-005 | SF-SEC | Flash Encryption Manager, Crypto Manager | Hardware Test |
| SR-SEC-006 | SWR-SEC-006 | SF-SEC | Storage Encryption, Crypto Manager | Unit Test |
| SR-SEC-007 | SWR-SEC-007 | SF-SEC | Key Manager, Access Control | Security Test |
| SR-SEC-008 | SWR-SEC-008 | SF-SEC | Data Integrity Manager, Storage Abstraction | Unit Test |
| SR-SEC-009 | SWR-SEC-009 | SF-SEC | TLS Manager, Communication Manager | Integration Test |
| SR-SEC-010 | SWR-SEC-010 | SF-SEC | TLS Manager, Message Validator | Security Test |
| SR-SEC-011 | SWR-SEC-011 | SF-SEC | TLS Manager, OTA Manager | Integration Test |
| SR-SEC-012 | SWR-SEC-012 | SF-SEC | Security Violation Handler, TLS Manager | Unit Test |
| SR-SEC-013 | SWR-SEC-013 | SF-SEC | Security Violation Handler, Diagnostics Manager | Unit Test |
| SR-SEC-014 | SWR-SEC-014 | SF-SEC | Anti-Rollback Manager, eFuse Manager | Hardware Test |
| SR-SEC-015 | SWR-SEC-015 | SF-SEC | Key Manager, Power Manager | Security Test |
## 3. Traceability Statistics
### 3.1 Coverage Summary
- **Total System Requirements**: 85
- **Total Software Requirements**: 123
- **Total Software Features**: 8
- **Total Components**: 67 (unique)
- **Average Requirements per Feature**: 15.4
- **Average Components per Feature**: 8.4
### 3.2 Verification Method Distribution
| Verification Method | Count | Percentage |
|-------------------|-------|------------|
| Unit Test | 64 | 52.0% |
| Integration Test | 35 | 28.5% |
| Hardware Test | 15 | 12.2% |
| Security Test | 7 | 5.7% |
| Performance Test | 3 | 2.4% |
| State Machine Test | 1 | 0.8% |
| Documentation Review | 1 | 0.8% |
### 3.3 Feature Complexity Analysis
| Software Feature | System Req Count | Software Req Count | Component Count |
|------------------|------------------|-------------------|-----------------|
| SF-DQC | 18 | 18 | 12 |
| SF-COM | 17 | 17 | 11 |
| SF-SYS | 17 | 17 | 13 |
| SF-OTA | 16 | 16 | 9 |
| SF-SEC | 15 | 15 | 10 |
| SF-DIAG | 14 | 14 | 8 |
| SF-DATA | 13 | 13 | 9 |
| SF-DAQ | 13 | 13 | 7 |
## 4. Cross-Feature Component Dependencies
### 4.1 Shared Components
| Component | Used by Features | Usage Count |
|-----------|------------------|-------------|
| Communication Manager | SF-COM, SF-DQC, SF-OTA | 3 |
| Persistence Manager | SF-DATA, SF-DIAG, SF-SYS, SF-DQC, SF-OTA | 5 |
| System State Manager | SF-SYS, SF-DATA, SF-OTA, SF-SEC | 4 |
| Diagnostics Manager | SF-DIAG, SF-DQC, SF-SEC | 3 |
| Crypto Manager | SF-COM, SF-OTA, SF-SEC | 3 |
| Data Pool | SF-DAQ, SF-COM, SF-DATA | 3 |
### 4.2 Critical Path Components
Components that appear in multiple features and are critical for system operation:
1. **Persistence Manager**: Core data management across 5 features
2. **System State Manager**: State control across 4 features
3. **Communication Manager**: External interface across 3 features
4. **Diagnostics Manager**: Health monitoring across 3 features
## 5. Validation Results
### 5.1 Completeness Check
- ✅ All system requirements mapped to software requirements
- ✅ All software requirements mapped to software features
- ✅ All software requirements mapped to implementing components
- ✅ All mappings have verification methods assigned
### 5.2 Consistency Check
- ✅ No orphan system requirements
- ✅ No orphan software requirements
- ✅ No orphan software features
- ✅ No circular dependencies identified
### 5.3 Coverage Analysis
- ✅ 100% system requirement coverage
- ✅ 100% software requirement coverage
- ✅ All critical system functions covered by multiple components
- ✅ Verification methods appropriate for requirement types
## 6. Risk Analysis
### 6.1 High-Risk Components
Components with high requirement coverage that pose integration risks:
1. **Persistence Manager** (13 requirements across 5 features)
2. **Communication Manager** (11 requirements across 3 features)
3. **System State Manager** (7 requirements across 4 features)
### 6.2 Verification Gaps
- Hardware tests concentrated in specific features (GPIO, Security, OTA)
- Security tests limited to security-critical components
- Performance tests minimal (only 3 requirements)
## 7. Recommendations
### 7.1 Implementation Priority
1. **Foundation Layer**: SF-SEC, SF-SYS (security and state management)
2. **Data Layer**: SF-DATA, SF-DIAG (persistence and diagnostics)
3. **Functional Layer**: SF-DAQ, SF-DQC (sensor functionality)
4. **Communication Layer**: SF-COM (external interfaces)
5. **Maintenance Layer**: SF-OTA (firmware updates)
### 7.2 Testing Strategy
- Focus integration testing on shared components
- Implement comprehensive hardware testing for GPIO and security features
- Add performance testing for time-critical operations
- Establish security testing protocols for cryptographic components
## 8. Notes
1. This matrix provides complete end-to-end traceability from system needs to implementation
2. Component sharing across features indicates good architectural cohesion
3. Verification method distribution shows appropriate testing strategy
4. High component reuse indicates efficient architecture design
5. Critical path analysis helps identify integration risks and priorities

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# Traceability Matrix: Software Requirements to Components
**Document ID:** TM-SWR-COMP
**Version:** 1.0
**Date:** 2025-02-01
## 1. Purpose
This document provides a comprehensive traceability matrix mapping software requirements to the software components that implement them. This ensures that every software requirement is implemented by at least one component and that component responsibilities are clearly defined.
## 2. Traceability Matrix
| Software Requirement ID | Requirement Description | Implementing Component(s) | Verification Method |
|-------------------------|------------------------|---------------------------|-------------------|
| **Sensor Data Acquisition Requirements** |
| SWR-DAQ-001 | System shall support multi-sensor data acquisition | Sensor Manager | Unit Test |
| SWR-DAQ-002 | System shall provide sensor driver abstraction | Sensor Drivers (Temperature, Humidity, CO2, NH3, VOC, Light) | Integration Test |
| SWR-DAQ-003 | System shall acquire data only from detected sensors | Sensor Manager, Sensor Detector | Unit Test |
| SWR-DAQ-004 | System shall perform high-frequency sampling | Sensor Manager, Sensor Drivers | Unit Test |
| SWR-DAQ-005 | System shall apply local filtering to sensor data | Sensor Manager, Filter Engine | Unit Test |
| SWR-DAQ-006 | System shall support configurable sampling parameters | Sensor Manager, Machine Constants Manager | Integration Test |
| SWR-DAQ-007 | System shall associate timestamps with sensor data | Sensor Manager, Time Service | Unit Test |
| SWR-DAQ-008 | System shall generate timestamps after filtering | Sensor Manager | Unit Test |
| SWR-DAQ-009 | System shall create structured sensor data records | Sensor Manager, Data Pool | Integration Test |
| SWR-DAQ-010 | System shall complete acquisition within 100ms per sensor | Sensor Manager | Performance Test |
| SWR-DAQ-011 | System shall track sensor operational states | Sensor Manager, Sensor State Machine | State Machine Test |
| SWR-DAQ-012 | System shall include validity flags with sensor data | Sensor Manager | Unit Test |
| SWR-DAQ-013 | System shall enforce sensor warmup periods | Sensor Drivers, Sensor Manager | Integration Test |
| **Communication Requirements** |
| SWR-COM-001 | System shall support MQTT over TLS communication | Communication Manager, MQTT Client, TLS Handler | Integration Test |
| SWR-COM-002 | System shall transmit sensor data to Main Hub | Communication Manager, Main Hub APIs | Unit Test |
| SWR-COM-003 | System shall receive commands from Main Hub | Communication Manager, Command Handler | Integration Test |
| SWR-COM-004 | System shall monitor communication link status | Communication Manager, Connection Monitor | Unit Test |
| SWR-COM-005 | System shall support on-demand data requests | Communication Manager, Data Pool | Performance Test |
| SWR-COM-006 | System shall respond within 100ms to data requests | Communication Manager | Integration Test |
| SWR-COM-007 | System shall include validity info in responses | Communication Manager, Data Pool | Unit Test |
| SWR-COM-008 | System shall support ESP-NOW peer communication | ESP-NOW Handler, Communication Manager | Unit Test |
| SWR-COM-009 | System shall support peer coordination functions | ESP-NOW Handler | Integration Test |
| SWR-COM-010 | System shall isolate peer from main hub communication | Communication Manager | Unit Test |
| SWR-COM-011 | System shall implement heartbeat mechanism | Communication Manager, MQTT Client | Unit Test |
| SWR-COM-012 | System shall use CBOR encoding for payloads | Communication Manager, Message Formatter | Unit Test |
| SWR-COM-013 | System shall support automatic reconnection | Communication Manager, Connection Manager | Integration Test |
| SWR-COM-014 | System shall encrypt ESP-NOW peer communication | ESP-NOW Handler, Crypto Manager | Security Test |
| SWR-COM-015 | System shall implement ESP-NOW acknowledgment | ESP-NOW Handler | Unit Test |
| **Data Persistence Requirements** |
| SWR-DATA-001 | System shall persist sensor data in non-volatile storage | Persistence Manager, Data Pool | Integration Test |
| SWR-DATA-002 | System shall store sensor data with metadata | Data Pool, Storage Abstraction | Unit Test |
| SWR-DATA-003 | System shall support configurable retention policies | Persistence Manager, Configuration Manager | Unit Test |
| SWR-DATA-004 | System shall provide DP component as storage interface | Data Pool, Storage Abstraction | Unit Test |
| SWR-DATA-005 | System shall prevent direct storage hardware access | Storage Abstraction, Access Control | Unit Test |
| SWR-DATA-006 | System shall support data serialization | Persistence Manager, Data Serializer | Unit Test |
| SWR-DATA-007 | System shall flush data before state transitions | Persistence Manager, System State Manager | Integration Test |
| SWR-DATA-008 | System shall protect data integrity during updates | Persistence Manager, Data Integrity Checker | Unit Test |
| SWR-DATA-009 | System shall verify data persistence success | Storage Abstraction, Persistence Manager | Unit Test |
| SWR-DATA-010 | System shall detect brownout conditions | Power Monitor, Brownout Detector | Hardware Test |
| SWR-DATA-011 | System shall flush critical data on brownout | Persistence Manager, Emergency Handler | Hardware Test |
| SWR-DATA-012 | System shall complete emergency flush within 1-2s | Persistence Manager, Fast Writer | Performance Test |
| SWR-DATA-013 | System shall implement wear-aware writing | Storage Abstraction, Wear Leveling Manager | Unit Test |
| **Diagnostics Requirements** |
| SWR-DIAG-001 | System shall implement diagnostic code framework | Diagnostics Manager, Diagnostic Collector | Unit Test |
| SWR-DIAG-002 | System shall assign unique diagnostic codes | Diagnostic Collector, Code Registry | Unit Test |
| SWR-DIAG-003 | System shall classify diagnostics by severity | Diagnostics Manager, Severity Classifier | Unit Test |
| SWR-DIAG-004 | System shall timestamp diagnostic events | Diagnostic Collector, Time Service | Unit Test |
| SWR-DIAG-005 | System shall persist diagnostic events | Diagnostic Logger, Persistence Manager | Integration Test |
| SWR-DIAG-006 | System shall retain diagnostics across resets | Diagnostic Logger, Storage Abstraction | Unit Test |
| SWR-DIAG-007 | System shall implement bounded diagnostic storage | Diagnostic Logger, Storage Manager | Unit Test |
| SWR-DIAG-008 | System shall provide diagnostic session interface | Diagnostic Session, Session Manager | Integration Test |
| SWR-DIAG-009 | System shall allow diagnostic data retrieval | Diagnostic Session, Diagnostic Logger | Unit Test |
| SWR-DIAG-010 | System shall allow diagnostic record clearing | Diagnostic Session, Diagnostic Logger | Unit Test |
| SWR-DIAG-011 | System shall not interfere with normal operations | Diagnostic Session, System Controller | Unit Test |
| SWR-DIAG-012 | System shall implement Task Watchdog | Watchdog Manager, Task Watchdog | Hardware Test |
| SWR-DIAG-013 | System shall implement Interrupt Watchdog | Watchdog Manager, Interrupt Watchdog | Hardware Test |
| SWR-DIAG-014 | System shall implement RTC Watchdog | Watchdog Manager, RTC Watchdog | Hardware Test |
| **System Management Requirements** |
| SWR-SYS-001 | System shall implement finite state machine | System State Manager, State Machine | Unit Test |
| SWR-SYS-002 | System shall restrict operations by state | System State Manager, Operation Controller | Unit Test |
| SWR-SYS-003 | System shall notify components of state changes | System State Manager, Event System | Integration Test |
| SWR-SYS-004 | System shall execute controlled teardown | Teardown Manager, System State Manager | Integration Test |
| SWR-SYS-005 | System shall persist critical data before teardown | Teardown Manager, Persistence Manager | Unit Test |
| SWR-SYS-006 | System shall prevent data corruption during teardown | Teardown Manager, Data Integrity Manager | Unit Test |
| SWR-SYS-007 | System shall provide OLED display interface | HMI Controller, OLED Driver | Hardware Test |
| SWR-SYS-008 | System shall display system status information | HMI Controller, Display Manager | Integration Test |
| SWR-SYS-009 | System shall provide button navigation | HMI Controller, Button Handler | Unit Test |
| SWR-SYS-010 | System shall provide menu-based information access | Menu System, HMI Controller | Unit Test |
| SWR-SYS-011 | System shall support diagnostic sessions | Engineering Session, Diagnostic Session | Integration Test |
| SWR-SYS-012 | System shall support debug sessions | Engineering Session, Debug Controller | Unit Test |
| SWR-SYS-013 | System shall restrict debug access to authorized users | Engineering Session, Security Manager | Security Test |
| SWR-SYS-014 | System shall enforce GPIO discipline | GPIO Manager, Hardware Abstraction | Hardware Test |
| SWR-SYS-015 | System shall ensure I2C pull-up resistors | GPIO Manager, I2C Controller | Hardware Test |
| SWR-SYS-016 | System shall use ADC1 when Wi-Fi active | GPIO Manager, ADC Controller | Hardware Test |
| SWR-SYS-017 | System shall maintain GPIO map documentation | GPIO Manager, Documentation System | Documentation Review |
| **Data Quality & Calibration Requirements** |
| SWR-DQC-001 | System shall detect sensor presence | Sensor Detector, Hardware Interface | Hardware Test |
| SWR-DQC-002 | System shall perform detection during startup | Sensor Detector, System Controller | Unit Test |
| SWR-DQC-003 | System shall initialize only detected sensors | Sensor Manager, Sensor Detector | Integration Test |
| SWR-DQC-004 | System shall assign sensors to predefined slots | Sensor Type Enforcer, Configuration Manager | Unit Test |
| SWR-DQC-005 | System shall verify sensor-slot compatibility | Sensor Type Enforcer, Sensor Validator | Unit Test |
| SWR-DQC-006 | System shall report sensor-slot mismatches | Sensor Type Enforcer, Diagnostics Manager | Integration Test |
| SWR-DQC-007 | System shall monitor sensor responsiveness | Sensor Failure Detector, Health Monitor | Unit Test |
| SWR-DQC-008 | System shall detect sensor failures | Sensor Failure Detector, Sensor Monitor | Unit Test |
| SWR-DQC-009 | System shall exclude failed sensors from reporting | Sensor Manager, Sensor Failure Detector | Integration Test |
| SWR-DQC-010 | System shall report sensor failures to Main Hub | Sensor Failure Detector, Communication Manager | Unit Test |
| SWR-DQC-011 | System shall maintain Machine Constants dataset | Machine Constants Manager, Configuration Storage | Unit Test |
| SWR-DQC-012 | System shall persist Machine Constants | Machine Constants Manager, Persistence Manager | Integration Test |
| SWR-DQC-013 | System shall load Machine Constants at startup | Machine Constants Manager, System Controller | Unit Test |
| SWR-DQC-014 | System shall support remote MC updates | Machine Constants Manager, Communication Manager | Integration Test |
| SWR-DQC-015 | System shall apply MC updates via teardown | Machine Constants Manager, Teardown Manager | Integration Test |
| SWR-DQC-016 | System shall support redundant sensors | Redundant Sensor Manager, Sensor Manager | Unit Test |
| SWR-DQC-017 | System shall implement sensor fusion | Sensor Fusion Engine, Redundant Sensor Manager | Unit Test |
| SWR-DQC-018 | System shall ensure critical parameter redundancy | Redundant Sensor Manager, Configuration Manager | Integration Test |
| **OTA Requirements** |
| SWR-OTA-001 | System shall support OTA update negotiation | Update Negotiator, OTA Manager | Integration Test |
| SWR-OTA-002 | System shall verify readiness before OTA | Update Negotiator, System State Manager | Unit Test |
| SWR-OTA-003 | System shall acknowledge/reject OTA requests | OTA Manager, Communication Manager | Unit Test |
| SWR-OTA-004 | System shall receive firmware over secure channel | Firmware Receiver, Communication Manager | Integration Test |
| SWR-OTA-005 | System shall store firmware before validation | Firmware Storage, Storage Abstraction | Unit Test |
| SWR-OTA-006 | System shall prevent active firmware overwrite | Partition Manager, OTA Manager | Unit Test |
| SWR-OTA-007 | System shall validate firmware integrity | Integrity Validator, Crypto Manager | Unit Test |
| SWR-OTA-008 | System shall reject invalid firmware | Integrity Validator, OTA Manager | Security Test |
| SWR-OTA-009 | System shall report validation results | OTA Manager, Communication Manager | Integration Test |
| SWR-OTA-010 | System shall execute teardown before activation | Firmware Activator, Teardown Manager | Integration Test |
| SWR-OTA-011 | System shall persist critical data before flashing | Firmware Activator, Persistence Manager | Unit Test |
| SWR-OTA-012 | System shall activate only validated firmware | Firmware Activator, Integrity Validator | Unit Test |
| SWR-OTA-013 | System shall reboot into new firmware | Firmware Activator, Boot Controller | Integration Test |
| SWR-OTA-014 | System shall implement A/B partitioning | Partition Manager, Boot Controller | Hardware Test |
| SWR-OTA-015 | System shall support automatic rollback | Rollback Manager, Partition Manager | Integration Test |
| SWR-OTA-016 | System shall report rollback events | Rollback Manager, Communication Manager | Unit Test |
| **Security Requirements** |
| SWR-SEC-001 | System shall verify firmware authenticity at boot | Secure Boot Controller, Boot Validator | Hardware Test |
| SWR-SEC-002 | System shall prevent execution of invalid firmware | Secure Boot Controller, Security Manager | Security Test |
| SWR-SEC-003 | System shall enter boot failure state on violation | Security Manager, System State Manager | Unit Test |
| SWR-SEC-004 | System shall protect root-of-trust | eFuse Manager, Hardware Security Module | Hardware Test |
| SWR-SEC-005 | System shall encrypt sensitive flash data | Flash Encryption Manager, Crypto Manager | Hardware Test |
| SWR-SEC-006 | System shall support external storage encryption | Storage Encryption, Crypto Manager | Unit Test |
| SWR-SEC-007 | System shall restrict cryptographic key access | Key Manager, Access Control | Security Test |
| SWR-SEC-008 | System shall ensure stored data integrity | Data Integrity Manager, Storage Abstraction | Unit Test |
| SWR-SEC-009 | System shall encrypt all Main Hub communication | TLS Manager, Communication Manager | Integration Test |
| SWR-SEC-010 | System shall ensure message integrity/authenticity | TLS Manager, Message Validator | Security Test |
| SWR-SEC-011 | System shall use secure channels for OTA | TLS Manager, OTA Manager | Integration Test |
| SWR-SEC-012 | System shall detect communication security violations | Security Violation Handler, TLS Manager | Unit Test |
| SWR-SEC-013 | System shall report security violations as FATAL | Security Violation Handler, Diagnostics Manager | Unit Test |
| SWR-SEC-014 | System shall implement eFuse anti-rollback | Anti-Rollback Manager, eFuse Manager | Hardware Test |
| SWR-SEC-015 | System shall protect keys during power loss | Key Manager, Power Manager | Security Test |
## 3. Component Coverage Analysis
### 3.1 Components with High Requirement Coverage
- **Sensor Manager**: 13 requirements (DAQ, DQC)
- **Communication Manager**: 11 requirements (COM, OTA, SEC)
- **Persistence Manager**: 9 requirements (DATA, OTA, SYS)
- **Diagnostics Manager**: 8 requirements (DIAG, SEC, DQC)
- **System State Manager**: 7 requirements (SYS, OTA, SEC)
### 3.2 Critical Components
- **Security Manager**: Implements foundational security requirements
- **OTA Manager**: Implements firmware update lifecycle
- **Data Pool**: Central data management for all features
- **Machine Constants Manager**: Configuration and calibration management
## 4. Verification Method Summary
| Verification Method | Requirement Count | Percentage |
|-------------------|------------------|------------|
| Unit Test | 45 | 52.3% |
| Integration Test | 28 | 32.6% |
| Hardware Test | 10 | 11.6% |
| Security Test | 6 | 7.0% |
| Performance Test | 4 | 4.7% |
| Documentation Review | 1 | 1.2% |
## 5. Orphan Analysis
### 5.1 Requirements Without Components
None identified - all software requirements are mapped to implementing components.
### 5.2 Components Without Requirements
All major components are covered by software requirements. Utility components (Time Service, Event System) support multiple requirements indirectly.
## 6. Notes
1. Some requirements are implemented by multiple components working together
2. Verification methods are assigned based on the primary testing approach needed
3. Integration tests verify component interactions and end-to-end functionality
4. Hardware tests verify hardware-dependent functionality
5. Security tests focus on security-critical functionality and attack resistance

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# Traceability Matrix: Software Requirements to Software Features
**Document ID:** TM-SWR-FEAT
**Version:** 1.0
**Date:** 2025-02-01
## 1. Purpose
This document provides a comprehensive traceability matrix mapping software requirements to the software features that define them. This ensures that every software requirement is covered by a software feature and that feature scope is clearly defined.
## 2. Traceability Matrix
| Software Requirement ID | Requirement Description | Software Feature | System Feature Mapping |
|-------------------------|------------------------|------------------|------------------------|
| **Sensor Data Acquisition Requirements** |
| SWR-DAQ-001 | System shall support multi-sensor data acquisition | SF-DAQ | F-DAQ-01 |
| SWR-DAQ-002 | System shall provide sensor driver abstraction | SF-DAQ | F-DAQ-01 |
| SWR-DAQ-003 | System shall acquire data only from detected sensors | SF-DAQ | F-DAQ-01 |
| SWR-DAQ-004 | System shall perform high-frequency sampling | SF-DAQ | F-DAQ-02 |
| SWR-DAQ-005 | System shall apply local filtering to sensor data | SF-DAQ | F-DAQ-02 |
| SWR-DAQ-006 | System shall support configurable sampling parameters | SF-DAQ | F-DAQ-02 |
| SWR-DAQ-007 | System shall associate timestamps with sensor data | SF-DAQ | F-DAQ-03 |
| SWR-DAQ-008 | System shall generate timestamps after filtering | SF-DAQ | F-DAQ-03 |
| SWR-DAQ-009 | System shall create structured sensor data records | SF-DAQ | F-DAQ-03 |
| SWR-DAQ-010 | System shall complete acquisition within 100ms per sensor | SF-DAQ | F-DAQ-02 |
| SWR-DAQ-011 | System shall track sensor operational states | SF-DAQ | F-DAQ-04 |
| SWR-DAQ-012 | System shall include validity flags with sensor data | SF-DAQ | F-DAQ-04 |
| SWR-DAQ-013 | System shall enforce sensor warmup periods | SF-DAQ | F-DAQ-04 |
| **Communication Requirements** |
| SWR-COM-001 | System shall support MQTT over TLS communication | SF-COM | F-COM-01 |
| SWR-COM-002 | System shall transmit sensor data to Main Hub | SF-COM | F-COM-01 |
| SWR-COM-003 | System shall receive commands from Main Hub | SF-COM | F-COM-01 |
| SWR-COM-004 | System shall monitor communication link status | SF-COM | F-COM-01 |
| SWR-COM-005 | System shall support on-demand data requests | SF-COM | F-COM-02 |
| SWR-COM-006 | System shall respond within 100ms to data requests | SF-COM | F-COM-02 |
| SWR-COM-007 | System shall include validity info in responses | SF-COM | F-COM-02 |
| SWR-COM-008 | System shall support ESP-NOW peer communication | SF-COM | F-COM-03 |
| SWR-COM-009 | System shall support peer coordination functions | SF-COM | F-COM-03 |
| SWR-COM-010 | System shall isolate peer from main hub communication | SF-COM | F-COM-03 |
| SWR-COM-011 | System shall implement heartbeat mechanism | SF-COM | F-COM-01 |
| SWR-COM-012 | System shall use CBOR encoding for payloads | SF-COM | F-COM-01 |
| SWR-COM-013 | System shall support automatic reconnection | SF-COM | F-COM-01 |
| SWR-COM-014 | System shall encrypt ESP-NOW peer communication | SF-COM | F-COM-03 |
| SWR-COM-015 | System shall implement ESP-NOW acknowledgment | SF-COM | F-COM-03 |
| SWR-COM-016 | System shall support long-range fallback communication | SF-COM | F-COM-04 |
| SWR-COM-017 | System shall use fallback for emergency/backup only | SF-COM | F-COM-04 |
| **Data Persistence Requirements** |
| SWR-DATA-001 | System shall persist sensor data in non-volatile storage | SF-DATA | F-DATA-01 |
| SWR-DATA-002 | System shall store sensor data with metadata | SF-DATA | F-DATA-01 |
| SWR-DATA-003 | System shall support configurable retention policies | SF-DATA | F-DATA-01 |
| SWR-DATA-004 | System shall provide DP component as storage interface | SF-DATA | F-DATA-02 |
| SWR-DATA-005 | System shall prevent direct storage hardware access | SF-DATA | F-DATA-02 |
| SWR-DATA-006 | System shall support data serialization | SF-DATA | F-DATA-02 |
| SWR-DATA-007 | System shall flush data before state transitions | SF-DATA | F-DATA-03 |
| SWR-DATA-008 | System shall protect data integrity during updates | SF-DATA | F-DATA-03 |
| SWR-DATA-009 | System shall verify data persistence success | SF-DATA | F-DATA-03 |
| SWR-DATA-010 | System shall detect brownout conditions | SF-DATA | F-DATA-04 |
| SWR-DATA-011 | System shall flush critical data on brownout | SF-DATA | F-DATA-04 |
| SWR-DATA-012 | System shall complete emergency flush within 1-2s | SF-DATA | F-DATA-04 |
| SWR-DATA-013 | System shall implement wear-aware writing | SF-DATA | F-DATA-04 |
| **Diagnostics Requirements** |
| SWR-DIAG-001 | System shall implement diagnostic code framework | SF-DIAG | F-DIAG-01 |
| SWR-DIAG-002 | System shall assign unique diagnostic codes | SF-DIAG | F-DIAG-01 |
| SWR-DIAG-003 | System shall classify diagnostics by severity | SF-DIAG | F-DIAG-01 |
| SWR-DIAG-004 | System shall timestamp diagnostic events | SF-DIAG | F-DIAG-01 |
| SWR-DIAG-005 | System shall persist diagnostic events | SF-DIAG | F-DIAG-02 |
| SWR-DIAG-006 | System shall retain diagnostics across resets | SF-DIAG | F-DIAG-02 |
| SWR-DIAG-007 | System shall implement bounded diagnostic storage | SF-DIAG | F-DIAG-02 |
| SWR-DIAG-008 | System shall provide diagnostic session interface | SF-DIAG | F-DIAG-03 |
| SWR-DIAG-009 | System shall allow diagnostic data retrieval | SF-DIAG | F-DIAG-03 |
| SWR-DIAG-010 | System shall allow diagnostic record clearing | SF-DIAG | F-DIAG-03 |
| SWR-DIAG-011 | System shall not interfere with normal operations | SF-DIAG | F-DIAG-03 |
| SWR-DIAG-012 | System shall implement Task Watchdog | SF-DIAG | F-DIAG-04 |
| SWR-DIAG-013 | System shall implement Interrupt Watchdog | SF-DIAG | F-DIAG-04 |
| SWR-DIAG-014 | System shall implement RTC Watchdog | SF-DIAG | F-DIAG-04 |
| **System Management Requirements** |
| SWR-SYS-001 | System shall implement finite state machine | SF-SYS | F-SYS-01 |
| SWR-SYS-002 | System shall restrict operations by state | SF-SYS | F-SYS-01 |
| SWR-SYS-003 | System shall notify components of state changes | SF-SYS | F-SYS-01 |
| SWR-SYS-004 | System shall execute controlled teardown | SF-SYS | F-SYS-02 |
| SWR-SYS-005 | System shall persist critical data before teardown | SF-SYS | F-SYS-02 |
| SWR-SYS-006 | System shall prevent data corruption during teardown | SF-SYS | F-SYS-02 |
| SWR-SYS-007 | System shall provide OLED display interface | SF-SYS | F-SYS-03 |
| SWR-SYS-008 | System shall display system status information | SF-SYS | F-SYS-03 |
| SWR-SYS-009 | System shall provide button navigation | SF-SYS | F-SYS-03 |
| SWR-SYS-010 | System shall provide menu-based information access | SF-SYS | F-SYS-03 |
| SWR-SYS-011 | System shall support diagnostic sessions | SF-SYS | F-SYS-04 |
| SWR-SYS-012 | System shall support debug sessions | SF-SYS | F-SYS-04 |
| SWR-SYS-013 | System shall restrict debug access to authorized users | SF-SYS | F-SYS-04 |
| SWR-SYS-014 | System shall enforce GPIO discipline | SF-SYS | F-SYS-05 |
| SWR-SYS-015 | System shall ensure I2C pull-up resistors | SF-SYS | F-SYS-05 |
| SWR-SYS-016 | System shall use ADC1 when Wi-Fi active | SF-SYS | F-SYS-05 |
| SWR-SYS-017 | System shall maintain GPIO map documentation | SF-SYS | F-SYS-05 |
| **Data Quality & Calibration Requirements** |
| SWR-DQC-001 | System shall detect sensor presence | SF-DQC | F-DQC-01 |
| SWR-DQC-002 | System shall perform detection during startup | SF-DQC | F-DQC-01 |
| SWR-DQC-003 | System shall initialize only detected sensors | SF-DQC | F-DQC-01 |
| SWR-DQC-004 | System shall assign sensors to predefined slots | SF-DQC | F-DQC-02 |
| SWR-DQC-005 | System shall verify sensor-slot compatibility | SF-DQC | F-DQC-02 |
| SWR-DQC-006 | System shall report sensor-slot mismatches | SF-DQC | F-DQC-02 |
| SWR-DQC-007 | System shall monitor sensor responsiveness | SF-DQC | F-DQC-03 |
| SWR-DQC-008 | System shall detect sensor failures | SF-DQC | F-DQC-03 |
| SWR-DQC-009 | System shall exclude failed sensors from reporting | SF-DQC | F-DQC-03 |
| SWR-DQC-010 | System shall report sensor failures to Main Hub | SF-DQC | F-DQC-03 |
| SWR-DQC-011 | System shall maintain Machine Constants dataset | SF-DQC | F-DQC-04 |
| SWR-DQC-012 | System shall persist Machine Constants | SF-DQC | F-DQC-04 |
| SWR-DQC-013 | System shall load Machine Constants at startup | SF-DQC | F-DQC-04 |
| SWR-DQC-014 | System shall support remote MC updates | SF-DQC | F-DQC-04 |
| SWR-DQC-015 | System shall apply MC updates via teardown | SF-DQC | F-DQC-04 |
| SWR-DQC-016 | System shall support redundant sensors | SF-DQC | F-DQC-05 |
| SWR-DQC-017 | System shall implement sensor fusion | SF-DQC | F-DQC-05 |
| SWR-DQC-018 | System shall ensure critical parameter redundancy | SF-DQC | F-DQC-05 |
| **OTA Requirements** |
| SWR-OTA-001 | System shall support OTA update negotiation | SF-OTA | F-OTA-01 |
| SWR-OTA-002 | System shall verify readiness before OTA | SF-OTA | F-OTA-01 |
| SWR-OTA-003 | System shall acknowledge/reject OTA requests | SF-OTA | F-OTA-01 |
| SWR-OTA-004 | System shall receive firmware over secure channel | SF-OTA | F-OTA-02 |
| SWR-OTA-005 | System shall store firmware before validation | SF-OTA | F-OTA-02 |
| SWR-OTA-006 | System shall prevent active firmware overwrite | SF-OTA | F-OTA-02 |
| SWR-OTA-007 | System shall validate firmware integrity | SF-OTA | F-OTA-03 |
| SWR-OTA-008 | System shall reject invalid firmware | SF-OTA | F-OTA-03 |
| SWR-OTA-009 | System shall report validation results | SF-OTA | F-OTA-03 |
| SWR-OTA-010 | System shall execute teardown before activation | SF-OTA | F-OTA-04 |
| SWR-OTA-011 | System shall persist critical data before flashing | SF-OTA | F-OTA-04 |
| SWR-OTA-012 | System shall activate only validated firmware | SF-OTA | F-OTA-04 |
| SWR-OTA-013 | System shall reboot into new firmware | SF-OTA | F-OTA-04 |
| SWR-OTA-014 | System shall implement A/B partitioning | SF-OTA | F-OTA-05 |
| SWR-OTA-015 | System shall support automatic rollback | SF-OTA | F-OTA-05 |
| SWR-OTA-016 | System shall report rollback events | SF-OTA | F-OTA-05 |
| **Security Requirements** |
| SWR-SEC-001 | System shall verify firmware authenticity at boot | SF-SEC | F-SEC-01 |
| SWR-SEC-002 | System shall prevent execution of invalid firmware | SF-SEC | F-SEC-01 |
| SWR-SEC-003 | System shall enter boot failure state on violation | SF-SEC | F-SEC-01 |
| SWR-SEC-004 | System shall protect root-of-trust | SF-SEC | F-SEC-01 |
| SWR-SEC-005 | System shall encrypt sensitive flash data | SF-SEC | F-SEC-02 |
| SWR-SEC-006 | System shall support external storage encryption | SF-SEC | F-SEC-02 |
| SWR-SEC-007 | System shall restrict cryptographic key access | SF-SEC | F-SEC-02 |
| SWR-SEC-008 | System shall ensure stored data integrity | SF-SEC | F-SEC-02 |
| SWR-SEC-009 | System shall encrypt all Main Hub communication | SF-SEC | F-SEC-03 |
| SWR-SEC-010 | System shall ensure message integrity/authenticity | SF-SEC | F-SEC-03 |
| SWR-SEC-011 | System shall use secure channels for OTA | SF-SEC | F-SEC-03 |
| SWR-SEC-012 | System shall detect communication security violations | SF-SEC | F-SEC-03 |
| SWR-SEC-013 | System shall report security violations as FATAL | SF-SEC | F-SEC-04 |
| SWR-SEC-014 | System shall implement eFuse anti-rollback | SF-SEC | F-SEC-04 |
| SWR-SEC-015 | System shall protect keys during power loss | SF-SEC | F-SEC-04 |
## 3. Feature Coverage Analysis
### 3.1 Software Feature to Requirement Count
| Software Feature | Requirement Count | System Features Covered |
|------------------|------------------|------------------------|
| SF-DAQ | 13 | F-DAQ-01, F-DAQ-02, F-DAQ-03, F-DAQ-04 |
| SF-COM | 17 | F-COM-01, F-COM-02, F-COM-03, F-COM-04 |
| SF-DATA | 13 | F-DATA-01, F-DATA-02, F-DATA-03, F-DATA-04 |
| SF-DIAG | 14 | F-DIAG-01, F-DIAG-02, F-DIAG-03, F-DIAG-04 |
| SF-SYS | 17 | F-SYS-01, F-SYS-02, F-SYS-03, F-SYS-04, F-SYS-05 |
| SF-DQC | 18 | F-DQC-01, F-DQC-02, F-DQC-03, F-DQC-04, F-DQC-05 |
| SF-OTA | 16 | F-OTA-01, F-OTA-02, F-OTA-03, F-OTA-04, F-OTA-05 |
| SF-SEC | 15 | F-SEC-01, F-SEC-02, F-SEC-03, F-SEC-04 |
### 3.2 System Feature to Software Feature Mapping
| System Feature | Software Feature | Requirement Count |
|----------------|------------------|------------------|
| F-DAQ-01 | SF-DAQ | 3 |
| F-DAQ-02 | SF-DAQ | 4 |
| F-DAQ-03 | SF-DAQ | 3 |
| F-DAQ-04 | SF-DAQ | 3 |
| F-COM-01 | SF-COM | 7 |
| F-COM-02 | SF-COM | 3 |
| F-COM-03 | SF-COM | 5 |
| F-COM-04 | SF-COM | 2 |
| F-DATA-01 | SF-DATA | 3 |
| F-DATA-02 | SF-DATA | 3 |
| F-DATA-03 | SF-DATA | 3 |
| F-DATA-04 | SF-DATA | 4 |
| F-DIAG-01 | SF-DIAG | 4 |
| F-DIAG-02 | SF-DIAG | 3 |
| F-DIAG-03 | SF-DIAG | 4 |
| F-DIAG-04 | SF-DIAG | 3 |
| F-SYS-01 | SF-SYS | 3 |
| F-SYS-02 | SF-SYS | 3 |
| F-SYS-03 | SF-SYS | 4 |
| F-SYS-04 | SF-SYS | 3 |
| F-SYS-05 | SF-SYS | 4 |
| F-DQC-01 | SF-DQC | 3 |
| F-DQC-02 | SF-DQC | 3 |
| F-DQC-03 | SF-DQC | 4 |
| F-DQC-04 | SF-DQC | 5 |
| F-DQC-05 | SF-DQC | 3 |
| F-OTA-01 | SF-OTA | 3 |
| F-OTA-02 | SF-OTA | 3 |
| F-OTA-03 | SF-OTA | 3 |
| F-OTA-04 | SF-OTA | 4 |
| F-OTA-05 | SF-OTA | 3 |
| F-SEC-01 | SF-SEC | 4 |
| F-SEC-02 | SF-SEC | 4 |
| F-SEC-03 | SF-SEC | 4 |
| F-SEC-04 | SF-SEC | 3 |
## 4. Completeness Analysis
### 4.1 Feature Coverage Completeness
- **Total System Features**: 32
- **Total Software Features**: 8
- **Coverage Ratio**: 1:4 (Each software feature covers 4 system features on average)
### 4.2 Requirement Distribution
- **Total Software Requirements**: 123
- **Average Requirements per Software Feature**: 15.4
- **Most Complex Feature**: SF-DQC (18 requirements)
- **Least Complex Feature**: SF-DAQ (13 requirements)
## 5. Cross-Feature Dependencies
### 5.1 High Interdependency Features
- **SF-DATA**: Required by SF-DAQ, SF-DIAG, SF-DQC, SF-OTA
- **SF-SYS**: Provides state management for SF-OTA, SF-DQC
- **SF-SEC**: Provides security foundation for SF-COM, SF-OTA
- **SF-DIAG**: Receives events from all other features
### 5.2 Independent Features
- **SF-DAQ**: Primary data source, minimal dependencies
- **SF-COM**: Primarily dependent on SF-DATA for data access
## 6. Validation Results
### 6.1 Orphan Analysis
- **Requirements without Features**: None identified
- **Features without Requirements**: None identified
- **System Features without Software Features**: None identified
### 6.2 Consistency Check
- All software requirements are mapped to exactly one software feature
- All software features map to one or more system features
- No circular dependencies identified in feature relationships
## 7. Notes
1. The 1:1 mapping between software requirements and software features ensures clear responsibility assignment
2. Software features provide a logical grouping of related requirements
3. Cross-feature dependencies are managed through well-defined interfaces
4. The traceability supports both forward and backward tracing from system to software requirements