Which statement differentiates validation from verification in method performance?

Which statement differentiates validation from verification in method performance?

• A. Validation is a full pre-use evaluation of performance; verification confirms that a validated method performs within the lab’s conditions during routine use
• B. Verification is a full pre-use evaluation; validation confirms routine use
• C. Validation and verification are identical
• D. Verification is only for instrument maintenance

Answer: (A)

Validation is the process of proving, before use, that a method will perform to predefined criteria for its intended purpose. Verification, on the other hand, is the check that a method, after it has been validated, actually performs within the lab’s real conditions during routine use with the lab’s equipment, personnel, and workflows.

So, the statement that best differentiates them says validation is a full pre-use evaluation of performance, while verification confirms that the validated method operates correctly under the lab’s normal, everyday conditions. This distinction matters because validation establishes suitability and performance characteristics before deployment, and verification ensures those performance expectations hold true in practice at that specific site.

The other ideas misplace the roles: treating verification as the full pre-use evaluation, claiming the two processes are identical, or restricting verification to instrument maintenance, all confuse the separate purposes of establishing performance standards versus confirming ongoing, routine capability.