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강해운,강창욱 한국산업경영시스템학회 2003 한국산업경영시스템학회 학술대회 Vol.2003 No.추계
CUSUM control charts are widely used in process with small shifts since they have reasonable detection capability for small shifts. CUSUM control charts, however, are less effective in detection for recurring cycles or frequent small shifts in process. With Shewhart control charts, we have applied the variety of run rules to check the stability of process in addition to the situations that some points fall outside the control limits. In this paper, we propose the Z-CUSUM control chart.
강해운,백재원,강창욱 한국산업경영시스템학회 2010 한국산업경영시스템학회지 Vol.33 No.2
Complex products may present more than one type of defects and these defects are not always of equal severity‘ These defects are class ified according to their seriousness and effect on product quality and performance. So, demerit systems are very effecti
강해운,강창욱,주백수,조상훈 한국산업경영시스템학회 2011 한국산업경영시스템학회 학술대회 Vol.2011 No.추계
전통적인 Demerit 관리도는 일반적으로 자동차, 컴퓨터, 핸드폰 등 하나의 복잡한 제품에서 다양한 유형의 결점들이 동시에 발생하는 공정을 모니터링하기 위하여 사용된다. 관리도에서 공정 평균의 작은 변동을 빠르게 감지하기 위한 방법으로 EWMA기법은 매우 효과적이다. 본 연구에서는 EWMA 기법 보다 공정 평균의 작은 변동에 더 좋은 성능을 보이는 GWMA기법과 전통적인 Demerit 관리도(1928)를 결합한 Demerit-GWMA(generally weighted moving average) 관리도를 제안하였으며 그 관리도의 수행도를 평가하였다. 그 수행도 평가 결과, Demerit-GWMA 관리도는 공정 평균의 작은 변동을 감지하는데 classical Demerit 관리도, Demerit-EWMA. 관리도에 비하여 더 민감하다.
순환주기나 빈번한 작은 이동이 발생하는 공정관리를 위한 Z-CUSUM 관리도
강해운,강창욱,백재원 한국품질경영학회 2004 품질경영학회지 Vol.32 No.2
CUSUM control charts are widely used to monitor processes with small shifts. CUSUM control charts are, however, less effective in detecting for recurring cycles or frequent small shifts in the processes. With Shewhart control charts, we have applied the variety of run rules to check the stability of process in addition to the situations that some points fall outside the control limits. In this paper, we propose the Z-CUSUM control chart for monitoring the process with recurring cycles or frequent small shifts by use of the zone concept as like the Shewhart control charts.
제품 설계 지원을 위한 디지털 마이스터 전문가 시스템의 설계
강해운(H. W. Kang),남성호(S. H. Nam),홍원표(W. P. Hong),이석우(S. W. Lee),최헌종(H. J. Choi) 한국정밀공학회 2005 한국정밀공학회 학술발표대회 논문집 Vol.2005 No.10월
Recently We make a study of the process expert system model in 2005. Process expert system concepts is applied to the digital meister expert system development. Well-designed expert systems imitate the reasoning processes experts use to solve specific problem. Specially, expert systems are used to the engineer in manufacturing industry for the process control, production management and system management. In this paper, we propose the digital meister expert system for product design process in manufacturing industry and we present introduction and contents of design process expert system methodology and software for the air purifier design system.
FIR을 이용한 Demerit-CUSUM 관리도의 수행도 평가
강해운(Hae-Woon Kang),강창욱(Chang-Wook Kang),백재원(Jae-Won Baik),남성호(Sung-Ho Nam) 한국산업경영시스템학회 2009 한국산업경영시스템학회지 Vol.32 No.1
Complex Products may present more than one type of defects and these defects are not always of equal severity. These defects are classified according to their seriousness and effect on product quality and performance. Demerit systems are very effective systems to monitoring the different types of defects. So, classical demerit control chart used to monitor counts of several different types of defects simultaneously in complex products. S.M. Na et al.(2003) proposed the Demerit-CUSUM for the improvement of the demerit control chart performance and Nembhard, D. A. et al.(2001) and G.Y. Cho et al.(2004) developed a Demerit control chart using the EWMA technique and evaluated the performance of the control chart. In this paper, we present an effective method for process control using the Demerit-CUSUM with fast initial response. Moreover, we evaluate exact performance of the Demerit-CUSUM control chart with fast initial response, Demerit-CUSUM and Demerit-EWMA according to changing sample size or parameters.