对不服从正态分布的质量特性值，用聚类方法构作控制图。

If quality characteristic value is not in the Gauss Distribution, clustering method is used to draw a control diagram.

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各种波动源(干扰)的存在，致使产品输出质量特性值发生变异或者漂移。

Due to the existence of uncertainty sources (disturbance), there is a variation or excursion for the quality characteristic value from the target value.

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以出入境货物的质量检验数据为基础，构建了出入境货物总体的质量特性值———质量指数，并提出了对其进行质量宏观分析与监测的方法。

Based on inspection data of imports and exports, this paper attempts to set up a quality index-the value of quality characteristic.

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