Optimal Design of Control Charts Based on ECTU
In statistical quality control, usually the mean and variance of a manufacturing process are monitored jointly by median and range chart with statistical robustness. In this paper, a joint by median and range chart scheme with variable sample size and sampling intervals is proposed. A cost function is derived and it provides a device for optimal selection of the design parameters. To evaluate the effectiveness of the proposed model, its adjusted average time to signal (AATS) and the expected cost per time unite (ECTU) are compared with that of a fixed-parameter chart through a numerical example. The results indicate that the saving from the developed model is possibly provided.
Cost Function Median Range Economic Design
LI Degao
Department of Statistics, Jiaxing University, P.R.China, 314001
国际会议
2009 International Institute of Applied Statistics Studies(2009 国际应用统计学术研讨会)
青岛
英文
1-5
2009-07-25（万方平台首次上网日期，不代表论文的发表时间）