Properties of VSI EWMA Charts for Monitoring Correlation Coefficients of Related Quality Characteristics

• 발행기관: 한국자료분석학회
• 저자명: Duk-Joon Chang Jae Man Lee
• 간행물 정보: 『Journal of The Korean Data Analysis Society (JKDAS)』Vol.6 No.6, 1511~1520쪽, 전체 10쪽
• 주제분류: 자연과학 > 통계학
• 파일형태: PDF
• 발행일자: 2004.12.30

영문 초록

Properties of the variable sampling interval(VSI) exponentially weighted moving average(EWMA) control charts for monitoring correlation coefficients of related quality characteristics are investigated. To compare the efficiencies of the proposed charts, the performances are evaluated for matched fixed sampling interval(FSI) and VSI charts in terms of average time to signal(ATS) and average number of samples to signal(ANSS). Average number of swiches(ANSW) of the proposed VSI charts are also investigated. From the numerical computation, we found that small values of smoothing constant with accumulate-combine approach is more effective in detecting small or moderate shifts in EWMA charts.

목차

1. Introduction

2. Description of Some Control Procedures

3. Shewhart Control Chart

4. EWMA Control Chart

5. Concluding Remarks

References

키워드

Shewhart chart VSI EWMA chart ANSS ATS ANSW