Which of the following is a responsibility of General Contractors during commissioning?

• A. Providing input into commissioning plan for CxA's review and approval
• B. Ensuring subcontractors' commissioning work is completed and cooperating with CxA in executing the commissioning plan
• C. Integrating commissioning schedule into overall project schedule
• D. Responding to questions and issues raised by CxA

Answer: (D)

During commissioning, the General Contractor’s direct obligation is to respond to questions and issues raised by the Commissioning Authority. The CxA identifies gaps, testing results, and performance concerns; the GC must acknowledge those findings, provide the requested information or records, coordinate with subcontractors to gather data or implement field changes, and verify that corrective actions meet the project’s design intent. This responsive communication keeps the commissioning process moving toward acceptance and occupancy.

While other duties like coordinating subcontractors’ commissioning work, integrating the commissioning schedule, or contributing input to the commissioning plan exist, they are secondary to promptly addressing CxA inquiries and issues. For example, if the CxA notes a discrepancy in a control sequence, the GC coordinates the investigation, gathers measurements, and implements the adjustment, then reports back the resolution. That ongoing back-and-forth with the CxA is the essential daily responsibility during commissioning.