Who is responsible for Construction Phase Cx Schedule Updates?

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

Answer: (C)

In construction-phase commissioning, updating the Construction Phase Cx Schedule is the responsibility of the CxA. The Commissioning Authority owns and manages the commissioning plan and the schedule of testing, inspections, and acceptance activities. They track progress, record test results, log deficiencies, and determine when re-testing or retests are needed, then reflect those changes in the schedule. This centralized ownership ensures the commissioning work stays aligned with the overall project timeline and quality objectives, and that all stakeholders receive an accurate, up-to-date view of commissioning status. The contractor performs the actual work and provides data and support, while the Cx Technician assists with field tasks, but neither typically bears the owner’s role for updating the Cx schedule. Shared responsibility is not the standard arrangement in this context.