排列图（帕累托图）可以用来进行质量控制是因为
- A.它按缺陷的数量多少画出一条曲线，反映了缺陷的变化趋势
- B.它将缺陷数量从大到小进行了排列，使人们关注数量最多的缺陷
- C.它将引起缺陷的原因从大到小排列，项目团队应关注造成最多缺陷的原因
- D.它反映了按时间顺序抽取的样本的数值点，能够清晰地看出过程实现的状态
正确答案及解析
正确答案
解析
帕累托图又叫排列图，是一种柱状图，按事件发生的频率排列而成，它显示由于某种原因引起的缺陷数量或不一致的排列顺序，是找出影响质量的主要因素的方法。帕累托图是直方图，用来确认问题和问题排序。 帕累托分析是确认造成系统质量问题的诸多因素中最为重要的几个因素。 帕累托分析也被称为80-20法则，意思是，80%的问题经常是由于20%的原因引起的。它将引起缺陷的原因从大到小排列，项目团队应关注造成最多缺陷的原因。因此选择C。
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