Operation and maintenance of facilities refers to the efforts made to operate and manage buildings and structures on a daily basis after their completion. This includes operating various systems and equipment within the facility, such as electricity, air conditioning, plumbing and sanitation, as well as supervising security and safety.

As for the maintenance aspect, it includes efforts to maintain the good condition of the facility, equipment and systems, and to repair any defects or damage that may occur in it. It includes preventive maintenance work aimed at preventing potential problems, as well as corrective maintenance to fix problems when they occur. The operation and maintenance of facilities aims to ensure the continuity of the work of the buildings and provide a safe and comfortable environment for users.