Journal of Korean Society for Quality Management (품질경영학회지)

Korean Society for Quality Management (한국품질경영학회)
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A Spare Ordering Policy with Random Lead Times

조달기간이 확률적인 경우의 예비품 주문정책

  • Yoon, S.P. (Department of Systems Management Engineering, Sungkyunkwan University) ;
  • Cho, T.C. (Department of Systems Management Engineering, Sungkyunkwan University)
  • 윤성필 (성균관대학교 시스템경영공학과) ;
  • 조태연 (성균관대학교 시스템경영공학과)
  • Published : 2007.03.31
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Abstract

A generalized spare ordering policy is treated in this paper. If the operating unit fails before a scheduled ordering time an expedited order is placed at the failure time instant, otherwise a regular order for a spare is placed at the scheduled time. The original unit is replaced when the ordered spare is delivered. The lifetime, regular and expedited lead times have general distributions. The problem is to find the optimum ordering time which minimizes the expected cost rate including the observation, ordering, uptime and down-time costs. Some properties regarding the optimal policy are derived. To explain the spare ordering policy a numerical example is also included.

Keywords

References

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