10. VERIFICATION Vs VALIDATION
Validation demonstrates that the product, as provided, will fulfill its intended use; whereas, verification addresses whether the work product properly reflects the specified requirements. In other words, verification ensures that “you built it right”; whereas, validation ensures that “you built the right thing.” Validation activities use approaches similar to verification (e.g., test, analysis, inspection, demonstration, or simulation). Often, the end users and other relevant stakeholders are involved in the validation activities. Both validation and verification activities often run concurrently and may use portions of the same environment.