산업경영시스템학회지 (Journal of Korean Society of Industrial and Systems Engineering)
- 제23권56호
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- Pages.83-92
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- 2000
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- 2005-0461(pISSN)
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- 2287-7975(eISSN)
A Control Scheme for a Gradual Drift in the Process Variance
초록
This paper presents a study on control schemes for gradual increases (drifts) in a process variance. A new control chart, the Drifting Variance Control Chart (DVCC) is designed using Likelihood Ratio Test (LRT), and the ARL performance of the chart is evaluated for different subgroup sizes. The performance of this chart is then compared to some of the popular control schemes for the process dispersion, like the Shewhart S
키워드