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논문 기본 정보

자료유형
학술저널
저자정보
Etsuko Kusukawa (Osaka Prefecture University) Takayuki Kotani (Osaka Prefecture University) Hiroshi Ohta (Osaka Prefecture University)
저널정보
대한산업공학회 Industrial Engineering & Management Systems Industrial Engineering & Management Systems 제7권 제2호
발행연도
2008.9
수록면
101 - 112 (12page)

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As charts to monitor the process fraction defectives, P, in the high-yield processes, Mishima et al. (2002) discussed a synthetic chart, the Synthetic CS chart, which integrates the CS (Confirmation Sample) <SUB>CCC(Cumulative Count of Conforming)-r</SUB> chart and the CCC-r chart. The Synthetic CS chart is designed to monitor quality characteristics in real-time. Recently, Kotani et al. (2005) presented the EWMA (Exponentially Weighted Moving-Average)<SUB>CCC-r</SUB> chart, which considers combining the quality characteristics monitored in the past with one monitored in real-time. In this paper, we present an alternative chart that is more superior to the EWMA<SUB>CCC-r</SUB> chart. It is an integration of the EWMA<SUB>CCC-r</SUB> chart and the CCC-r chart. In using the proposed chart, the quality characteristic is initially judged as either the in-control state or the out-of-control state, using the lower and upper control limits of the EWMA<SUB>CCC-r</SUB> chart. If the process is not judged as the in-control state by the EWMA<SUB>CCC-r</SUB> chart, the process is successively judged, using the CCC-r chart to confirm the judgement of the EWMA<SUB>CCC-r</SUB> chart. We compare the ANOS (Average Number of Observations to Signal) of the proposed chart with those of the EWMA<SUB>CCC-r</SUB> chart and the Synthetic CS chart. From the numerical experiments, with the small size of inspection items, the proposed chart is the most sensitive to detect especially the small shifts in P among other charts.

목차

Abstract
1. INTRODUCTION
2. NOTATION
3. OUTLINE OF THE STAND-ALONE CCC- r CHART
4. OUTLINE OF THE STAND-ALONE CSCCC-r CHART
5. OUTLINE OF THE SYNTHETIC CS CHART
6. OUTLINE OF THE STAND-ALONE EWMACCC-r CHART
7. PROPOSAL OF THE SYNTHETIC EWMA CHART
8. COMPARISON OF THE PERFORMANCE
9. CONCLUSIONS
REFERENCES

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