Minimal availability variation design of repairable system under discrete Weibull distribution

Based on the variation of instantaneous availability of new equipment in its early stage of application, we study the instantaneous availability model for a system with repairable assembly parts at discrete-time instances, and propose the concept of availability amplitude to characterize the instantaneous availability variation of this system. On this basis, the optimal model of the availability amplitude for the system is built. The particle-swarm method is applied to minimize the availability variation of this system under the assumption of discrete Weibull distribution which is abundant in equipment engineering. Finally, two examples are given to illustrate the effectiveness of the proposed model.