-s控制图中σ估计量的改进及应用

Improving and Applying the Estimator of σ in -s Shewhart Control Charts

在-s控制图中,对总体参数σ(总体标准差)的估计至关重要。但是现有国标GB/T4091-2001《常规控制图》中定义的σ估计量并不具有有效性。文章改进了σ的估计量,并将其应用在了-s控制图中。

In the x - s Shewhart Control Charts, it is very important to estimate the general parameter σ. However, it is a pity that in the existing estimator of GB/T 4091 -2001 the definition of σ is not effective. The paper improves the estimator of σ and applys it in x - s shewhart control charts.