This paper studies the joint optimization of spare part and maintenance scheduling for Serial-Parallel Multi -station Manufacturing Systems (SPMMS), where the overlap of spare part connections is especially investigated. In the SPMMS, the spare parts in inventory are shared by multiple stations during the maintenances. That leads to the spare part connection among multiple stations. Furthermore, one station may demand multiple types of spare parts, and these spare parts are respectively shared with other stations. A multi-layer hypergraph is introduced to describe the multiple types of connections within the SPMMS. Moreover, a hybrid Opportunistic Maintenance (OM) policy is proposed to incorporate the connections into the maintenance scheduling. Based on the above multi-layer hypergraph, a hierarchical optimization method is further developed to jointly optimize the spare part and maintenance policies. The numerical examples and comparisons show that the hybrid OM policy is more cost-effective than the compound-node OM policy, the time-window-based OM policy and the influence-based OM policy. It is also observed that different connections jointly affect the cost effectiveness of the OM policy.
展开▼
机译:本文研究了串行-并行多工位制造系统(SPMMS)备件和维护调度的联合优化,其中特别研究了备件连接的重叠性。在 SPMMS 中,库存中的备件在维护期间由多个站点共享。这导致了多个工位之间的备件连接。此外,一个工位可能需要多种类型的备件,这些备件分别与其他工位共享。引入了多层超图来描述SPMMS中的多种连接类型。此外,还提出了一种混合机会维护(OM)策略,将连接纳入维护计划。基于上述多层超图,进一步发展了一种分层优化方法,共同优化备件和维修策略。数值算例和对比表明,混合OM策略比复合节点OM策略、基于时间窗的OM策略和基于影响的OM策略更具成本效益。还观察到,不同的连接共同影响 OM 策略的成本效益。
展开▼