저장신뢰도 유지를 위한 최적 2단계 주기적 검사정책

Optimal Two-Stage Periodic Inspection Policy for Maintaining Storage Reliability

In this thesis we propose a two-stage periodic inspection model for maintainingthe reliability of a system in long-term storage. There are two types of tests avail-able; a fallible test and an error-free test. The system is overhauled at detection offailure or when the storage reliability after inspection becomes less than or equal tothe prespecied value. The expected cost per unit time until overhaul is derived anda procedure for minimizing the expected cost is suggested. The two-stage periodic inspection model is compared with the one-stage periodic inspection model for var- ious parameters of the cost function when the failure time follows exponential and Weibull distributions. The proposed model is then applied to an existing missile system for comparison with the current inspection policy.

In this thesis we propose a two-stage periodic inspection model for maintainingthe reliability of a system in long-term storage. There are two types of tests avail-able; a fallible test and an error-free test. The system is overhauled at detection offailure or when the storage reliability after inspection becomes less than or equal tothe prespecied value. The expected cost per unit time until overhaul is derived anda procedure for minimizing the expected cost is suggested. The two-stage periodic inspection model is compared with the one-stage periodic inspection model for var- ious parameters of the cost function when the failure time follows exponential and Weibull distributions. The proposed model is then applied to an existing missile system for comparison with the current inspection policy.