问题
单项选择题
Which of the following indicates the acceptable range of variation of a process as represented on the control chart
A) Mean.
B) Specification limit.
C) Rule of seven.
D) Upper and lower control limits.
答案
参考答案:D
解析: 下列哪项指出了在控制图中过程变量的可接受范围
A) 平均值。 B) 规格限制。
C) 七点规则。 D) 控制上限和下限。