XmR Performance Chart in Excel
Use an XmR Chart to Evaluate Stability of Processes Using Variable Data
Here is an example of an Individuals and Moving Range Chart (XmR chart) created using ChartSmartXL.
XmR chart data usually looks like this:
The XmR chart can help you evaluate a process when there is only one sample and they are farther apart: monthly postage expense, time to write a computer program, and so on.
Calculate, plot, and evaluate the range chart first. If it is "out of control," so is the process. If the range chart looks okay, then calculate, plot, and evaluate the X chart.
Learn More...
- Individual Moving Range chart (XmR chart) template in Excel
- Individual Moving Range chart (XmR chart) formula