자기상관이 있는 장치 공정에서 EWMA와 Shewhart 관리도와의 모니터링 효율성 비교 분석

• 영문명: A Comparative Analysis on the Efficiency of Monitoring between EWMA and Shewhart Chart in Instrumental Process with Autocorrelation
• 발행기관: 한국산업경영시스템학회
• 저자명: 조진형(Jin-Hyung Cho) 오현승(Hyun-Seung Oh) 이세재(Sae-Jae Lee) 정수일(Su-il Jung) 임택(Taek Lim) 백선상(Seong-seon Baek) 김병극(Byung-Keug Ki)
• 간행물 정보: 『산업경영시스템학회지』제35권 제4호, 118~125쪽, 전체 8쪽
• 주제분류: 경제경영 > 경영학
• 파일형태: PDF
• 발행일자: 2012.12.31

영문 초록

When monitoring an instrumental process, one often collects a host of data such as characteristic signals sent by a sensor in short time intervals. Characteristic data of short time intervals tend to be autocorrelated. In the instrumental processes often the practice of adjusting the setting value simply based on the previous one, so-called ‘adjacent point operation’, becomes more critical, since in the short run the deviations are harder to detect and in the long run they have amplified consequences. Stochastic modelling using ARIMA or AR models are not readily usable here. Due to the difficulty of dealing with autocorrelated data conventional practice is resorting to choosing the time interval where autocorrelation is weak enough then to using I-MR control chart to judge the process stability. In the autocorrelated instrumental processes it appears that using the Shewhart chart and the time interval data where autocorrelation is relatively not existent turns out to be a rather convenient and very useful practice to determine the process stability. However in the autocorrelated instrumental processes we intend to show that one would presumably do better using the EWMA control chart rather than just using the Shewhart chart along with some arbitrarily intervalled data, since the former is more sensitive to shifts given appropriate weights.

목차

1. 서론

2. 이론적 고찰

3. 우리나라 보편적인 장치산업의 운전

4. 자기상관이 있는 장치공정에서의 공정 관리 방법

5. 자기상관이 있는 장치공정에서의 EWMA 관리도 적용

6. 결론

Acknowledgement

References

키워드

Shewhart Chart EWMA Chart Autocorrelation Control-in/out Adjacent Point