What is the difference between verification testing and acceptance testing in RMF?

• A. Both same.
• B. Verification testing demonstrates controls function as designed; acceptance testing verifies system readiness for operation by the AO.
• C. Verification tests costs.
• D. Acceptance tests are done by developers.

Answer: (B)

The main distinction is that verification testing proves that controls function as designed and implemented, while acceptance testing determines if the system is ready to operate in the real environment and can be granted an Authorization to Operate by the Authorizing Official. Verification testing is focused on the technical validity of the controls—testing their actual behavior, effectiveness, and whether they meet the stated requirements. Acceptance testing moves beyond that to evaluate overall readiness for operation, risk posture, and whether the AO can approve the system for use in production. In RMF, you confirm through verification that controls work as intended, and through acceptance that the system can be trusted to function in the operational environment under agreed risk levels.