Abstract:

To reduce repair waiting time of field replaceable unit (LRU) caused by shortage of shop replacement unit (SRU), the cannibalization policy for the SRU is an effective way to improve the availability of equipment. For the problem that the traditional repairable system inventory strategy is not reasonable when the final repairable probability of spare parts is less than 1, it extends the multi-echelon technique for recoverable item control (METRIC) theory, and a model is built for evaluating the time-varying availability of incomplete repair parts under the condition of the two-level SRU cannibalization strategy. Compare and analyze the changes of the equipment’s availability before and after cannibalization. The experiment results show that the equipment availability can be improved to a certain extent, and the improved degree of equipment availability is related to the final repair probability of LRU and the number of initial spare parts. Finally, Monte Carlo simulation method is used to verify the model of spare parts support, and the error of simulation results and analytical results is less than 2%.