If quality characteristic value is not in the Gauss Distribution, clustering method is used to draw a control diagram.
对不服从正态分布的质量特性值，用聚类方法构作控制图。
Due to the existence of uncertainty sources (disturbance), there is a variation or excursion for the quality characteristic value from the target value.
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.
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。
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