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Optimal design of the inspection buffer for an unreliable process

Author

Listed:
  • Ilan Gilboa
  • Yale T. Herer
  • Haya Kaspi
  • Tzvi Raz

Abstract

Placing an inspection buffer immediately after an unreliable process subject to failure protects the process customers from receiving non-conforming products. Such protection is achieved by screening the buffer contents whenever a shift in the process is detected. Previous studies have suggested that, if properly designed, such buffers can reduce overall costs. In this paper we make two types of contributions to the study of inspection buffers. First, we refine the model proposed by Klastorin et al. (1993), by incorporating a more efficient way of sampling, a more realistic objective function and more accurate cost expressions. Second, we provide analytical results to assist in the calculation of the economically optimal buffer size. Specifically, these include conditions for determining whether an inspection buffer is at all justified and a theorem for bounding the search for the optimal buffer size. The performance of the search bound and the sensitivity of the model are examined computationally.

Suggested Citation

  • Ilan Gilboa & Yale T. Herer & Haya Kaspi & Tzvi Raz, 2000. "Optimal design of the inspection buffer for an unreliable process," International Journal of Production Research, Taylor & Francis Journals, vol. 38(1), pages 187-205, January.
  • Handle: RePEc:taf:tprsxx:v:38:y:2000:i:1:p:187-205
    DOI: 10.1080/002075400189644
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