Control charts based on inspection with gauges are an interesting alternative to monitor quantitative variables when measurement is complex or expensive. The main advantage over variable control charts lies in greater operational simplicity and economy. However, gauge-based control charts are usually less powerful in order to detect shifts in the process than variables control charts, when the same sample size is used. To improve its performance, the use of double sampling on gauge-based monitoring is proposed. The new chart shows better performance than $\overline{X},$ $S$ and $\overline{X}-S$ charts, for the same average sample size, keeping low sampling cost.

中文翻译：

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基于量规的最佳双采样控制图

当测量复杂或昂贵时，基于量规检查的控制图是监视定量变量的有趣替代方法。相对于可变控制图的主要优势在于操作更简单，更经济。但是，在使用相同样本量的情况下，基于量表的控制图通常不如变量控制图更能检测过程中的变化。为了提高其性能，建议在基于量规的监视中使用双重采样。新图表显示了比$\overline{X}，$ $\mathrm{小号}$ 和 $\overline{X}-\mathrm{小号}$ 图表，对于相同的平均样本量，保持较低的抽样成本。