Optimal age-replacement policy with age-dependent minimal-repair and random-leadtime

Shey Huei Sheu, William S. Griffith

Research output: Contribution to journalArticlepeer-review

59 Scopus citations


A generalized age-replacement policy with age-dependent minimal repair and random leadtime is considered. A model is developed for the average cost per unit time and is based on the stochastic behavior of the assumed system and reflects the cost of storing a spare as well as the cost of system downtime. Determination of the minimum-cost policy time is described and illustrated with a numerical example. Because the model and its analysis are general, several existing results are shown to be subsumed by this model.

Original languageEnglish
Pages (from-to)302-309
Number of pages8
JournalIEEE Transactions on Reliability
Issue number3
StatePublished - Sep 2001

Bibliographical note

Funding Information:
Manuscript received January 23, 1999; revised September 6, 1999, December 4, 1999, December 23, 1999, and January 13, 2000. This work was supported by the National Science Council of the Republic of China, under Grant NSC 86-2231-E-011-028. Responsible Editor: W-T. K. Chien S.-H. Sheu is with the Department of Industrial Management, National Taiwan University of Science and Technology, Taipei Taiwan - R.O.C. (e-mail: SHSheu@im.ntust.edu.tw). W. S. Griffith is with the Department of Statistics, University of Kentucky, Lexington, KY 40506 USA (e-mail: Griffith@ms.uky.edu). Publisher Item Identifier S 0018-9529(01)11174-7.


  • Inventory
  • Maintenance
  • Minimal repair
  • Replacement

ASJC Scopus subject areas

  • Safety, Risk, Reliability and Quality
  • Electrical and Electronic Engineering


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