Who is responsible for the Cx plan during the Design Phase?

• A. Project Manager
• B. Architect
• C. Contractor
• D. CxA

Answer: (D)

The Commissioning Authority (CxA) is responsible for the Cx plan during the Design Phase. The Cx plan lays out how systems will be tested, the sequence of commissioning activities, acceptance criteria, and the documentation needed to verify performance against the owner’s requirements. The CxA leads and coordinates the commissioning approach, ensuring the design team’s work supports testing and that requirements are integrated from the start. Other roles—such as the project manager, architect, and contractor—contribute input and carry out their duties, but ownership and creation of the plan in the design phase rests with the CxA to ensure a smooth, verifiable path through construction and occupancy.