全变化参数的中位值-极差联合控制图的经济设计

Joint Median and Range Chart Economic Model with Variable Parameter

在统计质量控制中,通常利用中位值图和极差图来控制生产过程的均值和方差.建立了全变化参数的中位值和极差联合控制图,同时提出了一种费用函数以提供最优化设计参数的方法,最后通过一个例子说明了该模型能节约成本.

In statistical quality control, usually the mean and variance of a manufacturing process are monitored jointly by Median and Range chart. In this paper, a joint by Median and Range chart scheme with variable parameter is proposed. A cost function is derived and it provides a device for optimal selection of the design parameters. Through a numerical example one can foresee the saving that the developed model possibly provides.