1, after-the-fact maintenance ----BM (Breakdown Maintenance) This is the earliest maintenance method, that is, out of trouble and then repair, not bad not repair.
2, preventive maintenance - PM (Preventive Maintenance) This is based on the inspection of the maintenance, the use of condition monitoring and fault diagnosis technology to predict the equipment, targeted to the hidden faults to be eliminated, so as to avoid and reduce the loss of downtime, divided into regular maintenance and Predictive maintenance in two ways.
3, improve the maintenance - CM (Corrective Maintenance) Improvement of maintenance is the continuous use of advanced technology methods and techniques to correct some of the defects of the equipment and inherent deficiencies, improve the advanced nature of the equipment, reliability and maintenance, improve the utilization of equipment.
4, maintenance prevention - MP (Maintenance Prevention) Maintenance Prevention is actually the design of repairability, advocating the design stage on the serious consideration of the reliability of equipment and maintenance issues. From the design and production to improve the quality of equipment, fundamentally prevent the occurrence of failures and accidents, reduce and avoid maintenance.
5, production maintenance - PM (Productive Maintenance) is a production-centered, production services for a maintenance system. It contains the specific content of the above four types of maintenance. For unimportant equipment is still practicing after-the-fact maintenance, for important equipment is the implementation of preventive maintenance, while in the repair of equipment to improve maintenance, equipment selection or self-development of equipment is to focus on the maintenance of equipment (maintenance prevention).