Recommissioning refers to which of the following?

• A. Applies Commissioning Only To New Construction Projects
• B. Applies Commissioning To A Project That Has Been Previously Delivered Using The Commissioning Process
• C. Involves Only The Initial Commissioning Phase
• D. Applies Commissioning To A Project That Has Been Previously Delivered Using The Commissioning Process, Possibly As Part Of Ongoing Commissioning Or Triggered By Use Change, Operational Problems, Or Other Needs

Answer: (D)

Recommissioning means reapplying the commissioning process to a project that has already been delivered with commissioning, with the aim of restoring or improving performance to meet current owner requirements. Over time, systems can drift due to changes in usage, maintenance practices, or aging equipment, so recommissioning addresses that drift. It can be part of ongoing commissioning activities, or triggered by a use change, operational problems, or other needs, making it different from the initial commissioning done on new construction. This approach helps ensure the building continues to operate as intended and to support occupant comfort and energy performance.