Proceedings of the Korean Society for Quality Management Conference (한국품질경영학회:학술대회논문집)
- 2006.11a
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- Pages.211-216
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- 2006
The CV Control Chart
- Kang, Chang-W (Hanyang University) ;
- Lee, Man-S (LG Philips) ;
- Hawkins, Douglas M. (University of Minnesota)
- Published : 2006.11.17
Abstract
Monitoring variability is a vital part of modem statistical process control. The conventional Shewhart Rand S charts address the setting where the in-control process readings have a constant variance. In some settings, however, it is the coefficient of variation, rather than the variance, that should be constant. This paper develops a chart, equivalent to the S chart, for monitoring the coefficient of variation using rational groups of observations.