Independent Verification and Validation (IV&V)

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A phased approach to testing, primarily used in the military and by defense contractors, which combines both validation and verification.

An example of these terms follows.
Validation: the contractor validates that the system meets specifications. This activity happens at the contractor?s facilities.
Verification: the client (usually military or government) verifies that the system meets the client?s requirements. This second activity usually happens at the client?s facilities.

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