Most existing research about complex systems maintenance assumes they consist of the same type of components. However, systems can be assembled with heterogeneous components (for example degrading and non-degrading components) that require different maintenance actions. Since industrial systems become more and more complex, more research about the maintenance of systems with heterogeneous components is needed. For this reason, in this paper, a system consisting of two groups of components: degrading and non-degrading components is analyzed. The main novelty of this paper is the evaluation of a maintenance policy at system-level coordinating condition-based maintenance for the degrading components, delay time to the maintenance and an inspection strategy for this heterogeneous system. To that end, an analytic cost model is built using the semi-regenerative processes theory. Furthermore, a safety constraint related to the reliability of the degrading components is imposed. To find the optimal maintenance strategy, meta-heuristic algorithms are used.

大多数关于复杂系统维护的现有研究都假设它们由相同类型的组件组成。但是，系统可以与需要不同维护操作的异构组件（例如降级和非降级组件）组装在一起。由于工业系统变得越来越复杂，需要对具有异构组件的系统的维护进行更多的研究。为此，在本文中，分析了由两组组件组成的系统：退化组件和非退化组件。本文的主要新颖之处在于评估系统级的维护策略，协调劣化组件的基于状态的维护，维护延迟时间以及该异构系统的检查策略。为此，使用半再生过程理论建立分析成本模型。此外，强加了与降级组件的可靠性相关的安全约束。为了找到最佳维护策略，使用元启发式算法。