A Production and Preventive Maintenance Policy with Two Types of Failures

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Journal of Korean Society for Quality Management > Volume 30(3); 2002 > Article

Journal of Korean Society for Quality Management 2002;30(3): 53-.

두 가지 고장형태를 고려한 생산 및 예방보전 정책

김호균¹, 조형수²

¹동의대학교 산업공학과
²부산대학교 BK21 로지스틱스 사업팀

A Production and Preventive Maintenance Policy with Two Types of Failures

ABSTRACT

This paper studies an economic manufacturing quantity (EMQ) model with two types of failures and planned preventive maintenance of the production facility. One is a type I (major) failure which should be corrected by a failure maintenance and the other is a type H (minor) failure which can be minimally repaired without interrupting the production run. The objective is to determine the lot size and preventive replacement policy minimizing the long-run expected cost per unit time. We consider a control policy with a constant production lot size and preventive maintenance after completing n production runs. It is assumed that both preventive and failure maintenance times are random and the demand arriving during a stock-out period is lost. An expression for the expected cost per unit time is obtained in the general case. A special case is discussed and numerical results are provided.

Key Words: EMQ Model;Preventive Maintenance;Major(minor) Failure;Minimal Repair;