变化抽样区间和样本容量的EWMA标准差控制图

摘要

为了提高EWMA标准差控制图的检测速度,提出变化抽样区间和样本容量EWMA标准差控制图,并同传统的EWMA和变化抽样区间的EWMA标准差控制图进行的比较.最后模拟结果显示对于较小的方差漂移,VSSI EWMA标准差控制图检测速度较快.%In order to improve the monitoring speed of EWMA standard deviation control chart, an EWMA control chart with variable sampling sizes and sampling intervals is proposed, in addition, makes comparison with the traditional and variable sampling interval's control chart. It turns out that the monitoring speed of VSSI EWMA standard deviation control chart is much faster in detecting small shifts through simulation.