RCM is currently a systematic engineering method used internationally to determine the installation (equipment) preventive maintenance needs and optimize the maintenance system. According to the national military standard GJB1378-92 "Development Requirements and Methods of Equipment Preventive Maintenance Outline", RCM is defined as: "In accordance with the principle of maintaining the inherent reliability and safety of equipment with the minimum resource consumption, use logical decision-making methods to determine the requirements of equipment preventive maintenance." The basic idea is to analyze the system's functions and faults, clarify the consequences of each fault in the system; use standardized logical decision-making procedures to determine the preventive countermeasures of each fault consequence: through on-site fault data statistics, expert evaluation, quantitative construction and other means, with the goal of ensuring safety and integrity, the minimum maintenance shutdown loss and minimum maintenance resource consumption.