Maintenance Scheduling For Multi-unit Systems With Hierarchical Dependences
RAMS 2016 The 62nd Annual Reliability & Maintainability Symposium
In this paper, we consider the issue of multi-component systems with hierarchical dependences which is unexplored in literature. Complex systems often can be divided into several subsystems where dependences between components are non-symmetrical due to stronger dependences within subsystems than those between subsystems. The nested Lévy copulas can be used in such a case. In addition, the economic dependence which provides grouping opportunities to reduce the mainte-nance cost is also considered. Five condition-based mainte-nance policies are proposed and evaluated to minimize the expected long-run maintenance cost.