The quality control chart basically fitted the normal distribution with the tendency change in some extent.
质控图基本符合正态分布，存在一定程度的趋势性变化。
Based on such an objective indicator, the traditional quality control chart can be improved and adjust the producing process better.
基于这样一种客观的综合指标，传统的产品质量控制图能得到进一步的改进，并能对产品生产过程进行更好的控制。
Objective to investigate status of studies using quality control chart and to provide reference for related studies.
目的探讨国内质量控制图的研究状况，为今后相关研究提供借鉴和参考。
Objective to investigate status of studies using quality control chart and to provide reference for related studies.
目的探讨国内质量控制图的研究状况，为今后相关研究提供借鉴和参考。
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