Abstract:

Dependent failures exist commonly in all kinds of systems. The traditional way of independent spare parts allocation is expected to cause great errors when it is applied to the spare parts allocation with dependent failures concerned. This paper analyzes the relation between the spare parts support level of fault source parts and the failure rate of the dependent parts. Computing methods for expected backorder and support cost of various parts are put forward. Furthermore, an optimal allocation model for spare parts including its solution is proposed with cost as its object and within constraints of expected backorder quantity. Eventually, the rationality and the project applicability of this model are proved through a case study.