MIL-STD-1540D
4. GENERAL REQUIREMENTS
4.1 OBJECTIVES OF VERIFICATION
This document outlines requirements for a verification process that shall be developed and used for launch vehicles, upper stage vehicles and space vehicles. During development of a launch vehicle, upper stage vehicle or space vehicle, verification is a fundamental process used to demonstrate that the system design meets applicable requirements and is capable of sustaining its operational role during the life cycle. Verification may be by analysis, test, inspection, demonstration, similarity, or a combination of these methods The verification objectives are primarily:
a. To qualify the design through an analysis, demonstration and test program that verifies that it meets performance and interface requirements when exposed to applicable environments.
b. To verify that the manufacturing process produces products that meet specified design requirements.
c. To ensure that flight hardware and software are free of workmanship and latent defects and are acceptable for flight.
d. To validate equipment and procedures necessary to support ground and flight operations.
e. To predict and confirm vehicle and system integrity and performance during all phases and that it completes its design life cycle including end-of-life performance requirements.
4.2 VERIFICATION ACTIVITIES
To reach the objectives stated in 4.1, verification activities shall be conceived and documented during the design and requirements definition phase. The requirements to be verified shall be analyzed taking into account design peculiarities, candidate solutions, qualification status of heritage units and subsystems, test and analysis methodologies, programmatic constraints, risk management process, cost, schedule, and allowable performance dispersions.
The verification activities are incrementally performed at different hardware and software assembly levels from units to the overall system, utilizing a suitable combination of verification methods. They apply to all project phases through the following main steps of the verification process:
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