Validation and Verification
Validation
In the waterfall model, validation operations provide feedback from Specification to
Requirements and from Implementation/unit testing to Specification.
Validation can be thought of as "Are we building the righy system?"
Verificatiom
Verification operations provide feedback from Integration/ system testing to
Implementation/unit testing, and from operations/maintenance back to Integration/system testing.
Verification asks "Are we building this system right/correctly?"