Validation
Validation means an evaluation to determine that each safety measure derived from a system safety process is correct, complete, consistent, unambiguous, verifiable, and technically feasible. Validation ensures that the right safety measure is implemented, and that the safety measure is well understood.
Source
14 CFR § 401.5
Scoping language
For the purposes of parts 415, 417, 431, 435, 440, and 460 of this chapter, the following definitions apply: