In this study, a reliability analysis method is discussed for the evaluation of the withdrawal ratio of non-repairable items to the normally working items of a controller product model. Although the analysis method is rather straightforward, one can estimate the probability of withdrawal and present the management a useful information on the appropriateness of the warranty period, exploiting the collected data, which is commonplace in the industrial site. For the methodology is to be refined, more systematic collection of data and adoption of more sophisticated analysis method are yet to be desired.

Abstract
 1. 서 론
 2. 신뢰성 척도
  2.1 신뢰도(reliability)
  2.2 고장률(failure rate)
  2.3 평균수명(mean time)
  2.4 백분위수명(percentile)
  2.5 평균잔여수명(mean residual life)
 3. 회수율 분석 사례
  3.1 수집 자료의 특성
  3.2. 자료의 정리
  3.3. 고장밀도함수의 추정
  3.4 신뢰성 척도의 추정
 4. 결론 및 제언
 참고문현

• 안해일(서경대학교)