Who is accountable for updating the Construction Phase schedule?

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

Answer: (D)

Coordinating and maintaining the schedule for commissioning-related activities is a key responsibility in the Construction Phase. The Construction Phase schedule isn’t just about construction progress; it also maps out testing, start-up, system verification, and acceptance tasks that must occur in a logical sequence before occupancy. The entity overseeing commissioning must keep this schedule current because changes in equipment readiness, test windows, or issue resolution ripple through the verification sequence. That ownership ensures systems are installed, tested, and verified on time. The contractor handles day-to-day progress updates, and the testing/start-up technician provides input on test timing, but neither alone owns the entire schedule that links construction to commissioning milestones. Assigning accountability to a single owner avoids misalignment, and the CxA fulfills that role because of their responsibility to plan, coordinate, and verify the commissioning process.