A Spare Ordering Policy for Preventive Replacement with Repair

Lim, Sung-Uk; Park, Young-Taek

Journal of Korean Society for Quality Management > Volume 39(4); 2011 > Article

Journal of Korean Society for Quality Management 2011;39(4): 480-.

수리가능한 품목의 예방교체를 위한 주문정책

임성욱¹, 박영택²

¹대진대학교 산업경영공학과
²성균관대학교 시스템경영영공학과

A Spare Ordering Policy for Preventive Replacement with Repair

Sung-Uk Lim¹, Young-Taek Park²

¹Daejin University
²Sungkyunkwan University

ABSTRACT

This paper presents a spare ordering policy for preventive replacement with minimal repair. To analyze the ordering policy, the failure process is modeled by a non-homogeneous Poisson process. Introducing the ordering, repair, downtime, replacement costs and salvage value, we derive the expected cost effectiveness as a criterion of optimality when the lifetime and lead times for the regular and expedited orders are generally distributed random variables. It is shown that, under certain conditions, there exists a finite and unique optimum ordering time which maximizes the expected cost effectiveness. A numerical example is also included to explain the proposed model.

Key Words: Ordering Policy;Preventive Replacement;Minimal Repair;