MIL-STD-1540D
the worst case service life environments. Consideration should be given to the following:
a. Probability of environmental occurrence.
b. Effect of combined environments (e.g., temperature, vibration, acceleration).
c. Mitigation of failure modes and effects including propagation and criticality.
d. Effect of equipment performance and criticality to mission success. e. Experience gained from identical equipment similarly used.
f. Effects of planned acceptance and qualification testing.
5.4 VERIFICATION METHODS
The verification process provides management tools to coordinate the many individuals and activities involved in assuring a successful mission. Generally separate verification activities are implemented for the hardware, the software, and for the integrated system tests. The verification methods shall include the following either singly or in combination:
a. Analysis b. Test
c. Inspection
d. Demonstration e. Similarity
Most requirements are verified using a combination of methods such as analysis and test or analysis and inspection. The applicable level of assembly may be the unit level, the subsystem level, the vehicle level, or the integrated system level for prelaunch or on-orbit configurations. The verification activities may be summarized by the preparation of detailed analysis plans, hardware qualification plans and procedures, software verification plans and procedures, hardware acceptance test plans and procedures, and integrated test plans and procedures.
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