In a contractor-managed approach, what is the CxA's role?

• A. They develop the plan and write test procedures
• B. They conduct all testing
• C. They oversee field testing only
• D. They review and approve the plan, witnessing selected tests, and reviewing completed test reports

Answer: (D)

In a contractor-managed approach, the CxA serves as the owner's verifier and coordinator, not the primary tester. Their job is to ensure the commissioning effort aligns with the project requirements by reviewing and approving the commissioning plan, witnessing selected tests to confirm critical functions operate as intended, and reviewing completed test reports to verify accuracy and that closure criteria are met. This provides independent oversight while the contractor performs the bulk of field testing under the CxA’s guidance. The other options imply the CxA does all testing, develops the plan, or only oversees activities, which does not reflect the oversight-and-verification role central to contractor-managed commissioning.