Journal of Korean Society of Industrial and Systems Engineering (산업경영시스템학회지)

Society of Korea Industrial and System Engineering (한국산업경영시스템학회)
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A Study of Demerit-DEWMA Control Chart

Demerit-DEWMA 관리도

  • Kang, Hae-Woon (Dept. of Industrial Engineering, Hanyang University) ;
  • Baik, Jae-Won (Dept. of Industrial Engineering, Hanyang University) ;
  • Kang, Chang-Wook (Dept. of Information and Industrial Engineering, Hanyang University)
  • Received : 2009.07.30
  • Accepted : 2009.10.07
  • Published : 2010.06.30
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Abstract

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. So, demerit systems are very effective systems to monitor the different types of defects. Recently, Kang et al.(2009) proposed the revised Demerit-CUSUM for the evaluation of the Demerit-CUSUM control chart performance exactly. In this paper, we present an advanced Demerit control chart using the double EWMA technique. The double EWMA technique is very efficient and strong method for process control where defects and nonconformities occur with various defect types. Moreover, we compare exact performance of Demerit-CUSUM, Demerit-EWMA and Demerit-DEWMA control chart according to changing sample size or mean shifts magnitude. By the result, we confirm that the performance of Demerit-DEWMA control chart is more than the performance of the Demerit-CUSUM and Demerit-EWMA control chart.

Keywords

References

  1. 강해운,강창욱, 백재원,남성호; "FIR을 이용한 Demerit- CUSUM 관리도의 수행도 평가'',산업경영시스템학회지,32(1) : 94-101,2009.
  2. 나상민,강창욱,심성보; "Demerit-CUSUM 관리도와 해석방법에 관한 연구", 한국품질경영학회지,31 (1) : 132-141,2003.
  3. 조교영, 전영목, "Demerit-EWMA 관리도에 관한 연구",한국데이터정보과학회지, 15(2) : 431-439,2004.
  4. Chang, F. M., Chen, L. H., Chen, Y. L.,, and Huang, C. Y.; "Approximate distribution of demerit statistic-A bounding approach," Computational Statistics and Data Analysis, 52(7) : 3300-3309, 2008. https://doi.org/10.1016/j.csda.2007.10.029
  5. Chimka, J. R. and Arispe,P. V.; "New Demerit Control Limits for Poisson Distributed Defects," Quality Engineering, 18(4) : 461-467,2006. https://doi.org/10.1080/08982110600817235
  6. Chimka,J. R. and Arispe,P. V.; "Type II Errors of Demerit Control Charts," Quality Engineering, 19(3) : 207-214,2007. https://doi.org/10.1080/08982110701477053
  7. Dodge,H. F. and Torrey, M. N.; "A Check Inspection and Demerit Rating Plan," Journal of Quality Technology, 9(3) : 146-156,1977.
  8. Lu,C. W. and Reynolds,M. R.; "EWMA control charts for monitoring the mean of autocorrelated processes," Journal of Quality Technology, 31(2) : 166-188,1999.
  9. Lingyun,Z.,Lopes and Gemai, C.; "An Extended EWMA Mean Chart," Quality Technology and Quantitative Management,2(1) : 39-52, 2005.
  10. Montgomery, D. C.; Introduction to Statistical Quality Control,5th Edition,John Wiley and Sons, Inc., New York: 300-416,2005.
  11. Nembhard,D. A. and Nembhard, H. B.; "A Demerit Control Chart for Autocorrelated Data," Quality Engineering,13(2) : 179-190, 2000. https://doi.org/10.1080/08982110108918640