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Powerful rules for the Hotelling's x~2 control chart

机译:Hotelling的x〜2控制图的强大规则

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The appeal of the X~2 chart rests in its simplicity and ability to detect large shifts in mean vector quickly. But it is not sensitive to small shifts in the mean. This may be overcome if the decision is based on several successive points plotted on a reduced DCL, for example, incorporating runs rules. But this may cause a delay in detecting larger shifts. The present article proposes combined rules which enable quick detection of larger shifts without reducing the speed of detecting the smaller ones. (7 refs.)
机译:X〜2图表的吸引力在于其简单性和能够快速检测出平均矢量的大变化。但这对均值的微小变化并不敏感。如果决策基于在缩减的DCL上绘制的几个连续点,例如合并运行规则,则可以克服这一点。但这可能会导致检测到较大的换档时出现延迟。本文提出了组合规则,该规则可以快速检测较大的班次而不降低检测较小班次的速度。 (7参考)

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