118 / 2025-05-15 18:34:08

A condition-based maintenance strategy with dynamic spare provision for three-state system

maintenance optimization, condition-based maintenance, dynamic spare provision, cost-efficiency, three-state system

Special Sessions > SSL 22 System dynamics, control and diagnosis of key components of rail vehicle

the appropriate spare provision supports the execution of maintenance activities efficiently. This paper investigates the condition-based maintenance for three-state system wherein a dynamic spare provision policy is devised. The stochastic standard, defect-induced standard and failure-induced emergent orderings are dynamically selective regarding diverse conditions to promote the strategy practicality and decision robustness. Specifically, based on the standard ordering at a stochastic time, 1) a defect-induced standard ordering is placed at defect identification without stochastic ordering before, 2) a failure-induced emergent ordering is placed at sudden failure without the extra ordering before, 3) a threshold controls whether another emergent ordering is needed when the spare has been standardly ordered but unreached at failure time. Furthermore, the postponed and immediate replacement activities are integrated referring to the states of spare and system operation. The cost-efficiency captured by long-run cost rate is established and optimized. The superiority of the proposed collaborative strategy compared with traditional devise is verified upon the railway bearings.