XmR Control Chart in Excel

Use an XmR Chart to Evaluate Stability of Processes Using Variable Data

Here is an example of an XmR chart created using QI Macros for Excel.

individual moving range XmR chart

XmR chart data examples:

XmR chart data may be a ratio of measurement.

x mr chart data example

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.

XmR Multi-Column Chart

This functionality is used if you select the entirety of your data set that has multiple columns of data:

Sample Data for XmR Multi Column Chart

And then run the XmR (Individuals) Chart macro from the "Control Charts (SPC)" > "Variable (XmR, XbarR/S)" drop-down menu, an XmR (Individuals) Chart will be automatically created for you:

Chart Output of XmR Multi Column Data

NOTE: The chart will show a number of series - this represents the number of columns within your data set, with a blank row placed between each data series.

Why Choose QI Macros Over Other Control Chart Software?

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