Cost model based optimization of RCM group maintenance interval

For the optimization of complex system RCM tasks, the group maintenance policy is introduced, and mathematical models are established to minimize the whole maintenance cost per unit time. The cost of traditional periodic replacement and functional check considering potential failure are analyzed, respectively; integrating several types of preventive maintenance, the complex system group maintenance cost model is obtained. By the joint execution of maintenance tasks, the times and loss of system shut-down are reduced and the maintenance cost can be saved. Finally, the effectiveness of the proposed models is illustrated through a numerical example.