Final answer:
Retro-commissioning is a process that improves existing buildings to make them more suitable for current use.
Step-by-step explanation:
The commissioning process described in the question is known as retro-commissioning. Retro-commissioning is performed on existing buildings to evaluate and improve the performance of their systems to meet current standards and requirements. It involves a thorough investigation of the building's systems, such as HVAC, lighting, and controls, to identify areas where improvements can be made for better energy efficiency, indoor air quality, and occupant comfort.