In commissioning, which party is primarily responsible for performing and documenting tests when in their scope?

• A. Architect and Engineers
• B. Trade Contractors
• C. CxA
• D. Building Owner

Answer: (B)

Testing and documenting the work actually done in the field falls to the party responsible for installing that part of the system. Trade contractors perform the functional and validation tests for their equipment or scope, and they compile the test results into reports and commissioning records. They’re the ones who verify that their installations operate correctly, meet specs, and document the outcomes so the overall commissioning process has traceable evidence. The commissioning authority coordinates and may witness these tests, but the primary execution and documentation come from the trades responsible for the equipment. Architects and engineers provide the design and acceptance criteria, while the building owner defines needs and requirements but does not typically perform the field testing.