Who performs Site Observations during the Construction Phase?

• A. Contractor
• B. CxA
• C. CxT
• D. Owner

Answer: (C)

Site Observations during Construction Phase are done by the Commissioning Technician (CxT) on site, under the direction of the Commissioning Authority (CxA). The CxT is the on-site observer who walks through installations, verifies conformance with design and sequencing, witnesses startup and pre-functional tests, and records findings in the commissioning checklists. This hands-on observation provides objective evidence that systems are installed correctly and are ready for the later functional performance tests. The CxA oversees the process, reviews the CxT’s observations, and coordinates the commissioning plan. The contractor performs the actual construction work, and the owner is typically not the on-site observer for commissioning.