Optimal Maintenance Policy for a One-shot System with Minimal Repair and Non-periodic Inspection Intervals  
Author Tomohiro Kitagawa


Co-Author(s) Tetsushi Yuge; Shigeru Yanagi


Abstract One-shot systems such as missiles and extinguishers are placed in storage for a long time and used only once during their lives. Their reliability deteriorates with time even when they are in storage, and their failures are detected only through inspections for their characteristics. Thus, we need to decide an appropriate inspection policy for such systems. In this paper, we deal with a system comprising non-identical units in series. The system is inspected every non-periodical interval, which depends on the number of failures of the system, and is minimally repaired when failures are detected at the inspections. When the nth failure is detected, all units in the system are replaced and the system becomes “as good as new.” We determine the optimal maintenance policy that minimizes the expected total system cost per unit of time.


Keywords one-shot system, storage system, cost rate, minimal repair, sequential inspection, genetic algorithm
    Article #:  20198
Proceedings of the 20th ISSAT International Conference on Reliability and Quality in Design
August 7-9, 2014 - Seattle, Washington, U.S.A.