4.4.10 - Command & Data Handling Subsystem (C&DH)

4.4.10-10 Level 2 Tasks

Tasks Applicable Mission Phases Description SFWC Artifacts References
4.4.10-10-1 Ensure all units and components have met their requirements and verification evidences are documented Phase B | Phase C | Phase D1 | Ensure reworked units are tested in accordance with applicable specifications and standards. Ensure verification progress is tracked using the verification ledger/matrix. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
4.4.10-10-2 Ensure subsystem has met all of its requirements and evidences are documented Phase D1 | Ensure that unit-to-bus system level testing verifies performance at temperatures and other environmental extremes at all levels of testing. Ensure that unit level testing stresses the unit as built to reveal issues at the lowest level of build and test. Ensure verification progress is tracked using the verification ledger/matrix. NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.10-10-3 Ensure hardware and software requirement buy-offs are completed as appropriate for subsystem Phase D1 | Ensure requirements are verified to the lowest level. Ensure any exceptions are addressed prior to approval. Ensure all requirement buy-off packages are documented. NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.10-10-4 Ensure all subsystem development anomalies and failures are documented and dispositioned in accordance to approved processes Phase D1 | Ensure that all components related to the anomaly are evaluated for overstress, including Acceptance Data Packages, Qualification Test Reports and raw test data when available. Ensure that any cross-program systemic issue is submitted to problem alerting processes. NA NA Mission Assurance Guide, TOR-2007(8546)-6018, Rev B, ITE chapter.
4.4.10-10-5 Ensure review of all verification and corrective action data for all developed hardware and software Phase D1 | Ensure all stakeholders review all test data and discrepancy documentation and have an opportunity to provide comments and recommendations for corrective action. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Mission Assurance Guide, TOR-2007(8546)-6018, Rev B
4.4.10-10-6 Ensure that system recovery and failure modes perform as anticipated Phase D1 | Ensure baseline, thermal-vacuum and factory acceptance testing of subsystem includes entry into, and successful exit from, safe-modes. Ensure results of testing are analyzed for expected subsystem responses. NA NA Space Vehicle Test and Evaluation Handbook, TOR-2011(8591)-2
4.4.10-10-7 Ensure the flight hardware operates with the software while performing a stressing- and extended-mission scenario under required environmental conditions Phase B | Phase C | Phase D1 | Ensure the complete interface between hardware and software (including firmware and Start-up Code) is demonstrated to operate over the environmental conditions. For PDR: ensure provision of description of test articles, test scenario, test environmental conditions and supporting test equipment for proto-qual/qualification article. Environmental conditions should include primarily temperature, but may also include vacuum, vibration, and shock. CDR - describe verification and qualification plan for flight items. D1- provide evidence of compliance to approved verification plans and requirements. NA NA Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494