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I-MR Chart

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I-MR Chart - definitions

I-MR Chart - An I-MR chart, or individual and moving range chart, is a graphical tool that displays process variation over time. It signals when a process may be going out of control and shows where to look for sources of special cause variation.

[Category=Data Quality ]

Source: iSixSigma, 26 January 2011 08:12:26, http://www.isixsigma.com/index.php?option=com_glossary External


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I/MR Chart - The I/MR chart is a combined chart consisting of: 'individuals' (I) chart with values of each individual observation that provides a means to assess process center; and a 'moving range' (MR) chart with the range calculated from subgroups created from successive observations that provides a means to assess process variation. I/MR chart is used to draw a combined control chart for assessing whether process center and variation are in control when your data is individual observations. When subgroups are available use an X-Bar & R Chart.

[Category=Quality ]

Source: The Quality Portal, 12 April 2011 07:32:15, http://thequalityportal.com/glossary/g.htm External 


Data Quality Glossary.  A free resource from GRC Data Intelligence. For comments, questions or feedback: dqglossary@grcdi.nl