Preventive maintenance is a proactive approach to maintaining the condition of a machine or system. It involves regular inspections, tests, and replacements to ensure that the machine or system is operating at its peak performance. This type of maintenance is designed to detect any potential problems before they become serious and to keep the machine or system running efficiently. Preventive maintenance is important for any machine or system because it can help to reduce downtime, improve safety, and increase the life of the machine or system. It also helps to reduce the cost of repairs and replacement parts, as well as the cost of labor. Preventive maintenance can be performed by a qualified technician or by the user of the machine or system. Regular inspections, tests, and replacements should be performed to ensure that the machine or system is operating at its peak performance. Additionally, preventive maintenance should be done on a regular basis to ensure that any potential problems are detected and addressed quickly.