Communications for Statistical Applications and Methods

  • 제5권3호
  • /
  • Pages.645-657
  • /
  • 1998
  • /
  • 2287-7843(pISSN)
  • /
  • 2383-4757(eISSN)
한국통계학회 (The Korean Statistical Society)
권호 표지

The Effect of Estimated Control Limits

  • JaiWook Baik (Department of Applied Statistics, Korea national Open University) ;
  • TaiYon Won (Department of Applied Statistics, Chung Ang University)
  • 발행 : 1998.12.01
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초록

During the start-up of a process or in a job-shop environment conventional use of control charts may lead to erroneous results due to the limited number of subgroups used for the construction of control limits. This article considers the effect of using estimated control limits based on a limited number of subgroups. Especially we investigate the performance of $\overline{X}$ and R control charts when the data are independent, and X control chart when the data are serially correlated in terms of average run length(ARL) and standard deviation run length(SDRL) using simulation. It is found that the ARL and SDRL get larger as the number of subgroups used for the construction of the chart becomes smaller.

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참고문헌

  1. Ph.D. dissertation $\={X}$ control charts in the presence of correlation Baik, JaiWook
  2. Quality and Reliability Engineering International v.11 A Kalman filtering process control scheme with an application in semiconductor short run manufacturing Castillo, E. D.;Montgomery, D. C.
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  4. Journal of Quality Technology $\={X}$ control limits based on a small number of subgroups Hillier, F. S.
  5. Journal of Quality Technology $\={X}$ and R control limits based on a small number of subgroups Hillier, F. S.
  6. Introduction to Statistical Quality Control, (2nd Edition) Montgomery, D. C.
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  8. The effect of sample size on estimated linits for $\= Quesenberry, C. P.
  9. Journal of Quality Technology v.25 The effect of sample size on estimated linits for $\={X}$ and X control charts Quesenberry, C. P.
  10. Journal of Quality Technology v.27 Geometric Q charts for high quality processes Quesenberry, C. P.
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