| 4.4.8-5-1 Ensure a complete system to subsystem to unit requirement verification plan is adequately developed and documented for the subsystem to support an overall system verification |
Phase A |
Phase B |
Phase C |
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Ensure verification plan addresses requirements verification to include units, assemblies, sub-assemblies and parts. Track evidence of analysis and test in the system and unit specifications, and require specification verification matrices to document where the requirements are verified. Ensure preliminary Independent Verification and Validation, and Integration and Test plan is ready at Preliminary Design Review and completed by Critical Design Review. Ensure any special test equipment is described at Preliminary Design Review and provided by Critical Design Review. Ensure verification plan reflects the intent of the Mission Assurance Standards.
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NA
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NA
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Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Space Systems Verification Program and Management Plan, AIAA S-117-2010
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| 4.4.8-5-2 Ensure the verification method is appropriate, adequate and documented |
Phase B |
Phase C |
Phase D1 |
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Ensure any verification by similarity is justified and documented by Preliminary Design Review, updated at Critical Design Review. Ensure that subsystem/major component verification addresses all requirements and requirements satisfied at a lower level are accounted for in the requirement verification documentation. Ensure unit level testing conforms to required standards testing. Ensure Test-like-you-fly process is implemented and like-you-fly tests are allocated to the unit/component level as appropriate.
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NA
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NA
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Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Space Systems Verification Program and Management Process, AIAA S-117-2010
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| 4.4.8-5-3 Ensure test planning adequately covers all operating modes and mission phases |
Phase B |
Phase C |
Phase D1 |
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Ensure Test-like-you-fly process is implemented and like-you-fly tests are allocated to the unit/component level as appropriate.
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NA
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NA
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Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
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| 4.4.8-5-4 Ensure that the thruster testing matches mission requirements and CONOPs for lifetime throughput and duty cycle, maximum on-time, thermal conditions, etc. |
Phase B |
Phase C |
Phase D1 |
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Thrusters are an early acquisition thus earlier verification is required for Test-like-you-fly aspects including the qualification of the thruster for how it will be used in flight.
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NA
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NA
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Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
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| 4.4.8-5-5 Ensure unit test plans are complete, objectives are clear and test success criteria are defined |
Phase A |
Phase B |
Phase C |
Phase D1 |
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Good design and manufacturing principles will result in minimum returns and rework at the subsystem level. This is particularly important for propulsion subsystems because assembly occurs early in vehicle production and many unit tests cannot be repeated at the subsystem level of assembly (e.g. hot-fire testing).
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NA
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NA
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Space Vehicle Systems Engineering Handbook (TOR-2006(8506)-4494)
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| 4.4.8-5-6 Ensure special test facilities and equipment for integration and test verification are identified, reserved and or acquired |
Phase A |
Phase B |
Phase C |
Phase D1 |
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Ensure that access to shared facilities (e.g. radiation, acoustics, thermal vacuum) that requires advance planning is considered. Ensure that a loading assessment for an appropriate number of internal shared equipment, such as test beds and engineering units to accommodate the baseline schedule, including multiple items/space vehicles in flow is considered. Some special test equipment may have long acquisition lead times.
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NA
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NA
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Mission Assurance Guide, TOR-2007(8546)-6018, Rev B, Integration, Test, and Evaluation Chapter
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| 4.4.8-5-7 Ensure propulsion budget and margins are defined and continue to be tracked throughout development |
Phase B |
Phase C |
Phase D1 |
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Consider margins against launch vehicle capability, structural capability, and propellant tank capacity
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NA
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NA
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Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
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| 4.4.8-5-8 Ensure that test plans include adequate polarity testing of all electrical connections (valve drivers, squib drivers, latch valve drivers, etc.) |
Phase B |
Phase C |
Phase D1 |
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Polarity testing may need to be supplemented by flight-like commanding in cases where primary and redundant electrical paths power a single mechanism (e.g. valves with redundant coils)
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NA
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NA
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Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
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| 4.4.8-5-9 Ensure that test plans include adequate plumbing checks to avoid swapping or mixing of fuel and oxidizer lines |
Phase B |
Phase C |
Phase D1 |
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Both TR-RS-2015-00005 and AFSPCMAN 91-710 list requirements for what is considered an adequate check to avoid swapping/mixing fuel and oxidizer.
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NA
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NA
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Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494; Design and Test Requirements for Space Flight Pressurized Systems, TR-RS-2015-00005; Range Safety User Requirements, AFSPCMAN 91-710
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| 4.4.8-5-10 Ensure that all test procedures are finalized and that test hardware is in good condition |
Phase C |
Phase D1 |
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Ensure that subsystem tests will be performed prior to vehicle-level testing.
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NA
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NA
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Space Vehicle Systems Engineering Handbook, TOR-2006(8506)-4494
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