George Mason University
Statistical Process Improvement




Control charts are useful for data that are collected over different time frames.   None of the charts discussed here can be used for data that are collected for only one time period.  Please use other sources for analysis of your data.


This page was last revised on 05/03/2015 by Farrokh Alemi, Ph.D.  This guide to control charts is part of the course on Quality / Process Improvement