Maintenance refers to the process of keeping buildings, facilities, equipment, or systems in good working condition by performing regular checks, repairs, and upgrades. It involves all the activities that ensure the effective and efficient operation of an asset throughout its life cycle. Maintenance can be categorized into various types, including preventive, corrective, and predictive maintenance, depending on the objectives and the type of assets being managed. The main functions of maintenance are to ensure the continued performance of the equipment and facilities, reduce downtime, and prolong the useful life of the assets. These functions involve inspecting, cleaning, lubricating, adjusting, and repairing equipment and systems. The maintenance process is crucial in preventing malfunctions and addressing issues before they become critical, ensuring that the overall operation of a building or facility runs smoothly. The objectives of maintenance include minimizing the total cost of ownership, enhancing the reliability of assets, and improving safety and comfort. Effective maintenance practices help in achieving high levels of operational efficiency and reduce the need for expensive repairs. Another important objective is ensuring compliance with health, safety, and environmental regulations, which often require the maintenance of certain standards in the operation of buildings and equipment. One of the primary functions of maintenance is preventive maintenance, which is carried out on a scheduled basis to prevent equipment