Determination of the Resetting Time to the Process Mean Shift based on the Cpm+

• 영문명: Cpm+ 기준에서의 공정평균이동에 대한 재조정 기간 결정
• 발행기관: 한국산업경영시스템학회
• 저자명: Do-Kyung Lee(이도경)
• 간행물 정보: 『산업경영시스템학회지』제41권 제1호, 110~117쪽, 전체 8쪽
• 주제분류: 경제경영 > 경영학
• 파일형태: PDF
• 발행일자: 2018.03.30

영문 초록

Machines and facilities are physically or chemically degenerated by continuous usage. One of the results of this degeneration is the process mean shift. By the result of degeneration, non-conforming products and malfunction of machine occur. Therefore a periodic preventive resetting the process is necessary. This type of preventive action is called ‘preventive maintenance policy.’ Preventive maintenance presupposes that the preventive (resetting the process) cost is smaller than the cost of failure caused by the malfunction of machine. The process mean shift problem is a field of preventive maintenance. This field deals the interrelation-ship between the quality cost and the process resetting cost before machine breaks down. Quality cost is the sum of the non-conform-ing item cost and quality loss cost. Quality loss cost is due to the deviation between the quality characteristics from the target value. Under the process mean shift, the quality cost is increasing continuously whereas the process resetting cost is constant value. The objective function is total costs per unit wear, the decision variables are the wear limit (resetting period) and the initial process mean. Comparing the previous studies, we set the process variance as an increasing concave function and set the quality loss function as Cpm+ simultaneously. In the Cpm+, loss function has different cost coefficients according to the direction of the quality characteristics from target value. A numerical example is presented.

목차

1. 서 론

2. 기존 연구

3. 모형의 구성

4. 수치 예제

5. 결 론

키워드

Process Mean Shift Quality Loss Function Cpm+ Wear Limit