计量型统计过程控制的应用

Statistical Process Control(SPC) is an important way for modern enterprise to conduct quality management.Using SPC can reduce rejection rate on a large scale and improve efficiency of the enterprise.SPC collects the data of process on time,compares the measured result of correspondent process with the standard figure,and deside whether the process is in controlled state with the control chart and many other sampling statistics method.This paper introduce control of variable SPC,including normal distribution,the feature of sampling statistics by variables ,the function of control chart,and then shows the process of practical use and the construction way of mean-range control chart.