控制图
control chart
中文定义
一种统计过程控制工具，用于监控过程判定其是否被统计受控。通过 图形化的描述过程的平均值和上部及下部控制极限（最高和最低 值）。
English Definition
A statistical process control tool used to monitor a process and determine whether it is statistically controlled. It graphically depicts the average value and the upper and lower control limits (the highest and lowest values) of a process.