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가변모수를 갖는 EWMA 관리도EWMA Control Charts with Variable Parameter
- Issue Date
- 2005
- Publisher
- 한국품질경영학회
- Keywords
- EWMA Chart; Variable Parameter; Variable Sampling Rate; Variable Weight
- Citation
- 품질경영학회지, v.33, no.4, pp 117 - 122
- Pages
- 6
- Journal Title
- 품질경영학회지
- Volume
- 33
- Number
- 4
- Start Page
- 117
- End Page
- 122
- ISSN
- 1229-1889
- Abstract
- Variable sampling rate(VSR) scheme varies the sampling rate for the current sample depending on the previous value of the control statistic. In this paper, we propose EWMA control charts with variable parameter(VP) scheme, which allows both the sample rate(the sample size or the sampling interval) and the weight to vary. We investigate the effectiveness of the VP scheme relative to the fixed parameter(FP) scheme and the VSR scheme in EWMA control charts. It is shown that using the VP scheme gives some improvements to the ability in detecting small and moderate shifts in the process normal mean.
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