Choose Index below for a list of all words and phrases defined in this glossary.
X-Bar Chart - Average chart.
[Category=Quality ]
Source: American Society for Quality, 31 October 2010 09:10:44, http://www.asq.org/glossary/
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X-Bar and R Charts - This set of two charts is the most commonly used statistical process control procedure. Used to monitor process behavior and outcome overtime.
X-Bar and R charts draw a control chart for subgroup means and a control chart for subgroup ranges in one graphic. Interpreting both charts together allows you to track both process center and process variation and detect the presence of special causes. Generally, a user focuses on the range portion of the chart first, confirming that the process is in control. Finally, the user focuses on the average chart, looking for special cause there.
[Category=Data Quality ]
Source: iSixSigma, 05 March 2011 09:58:16, https:web.archive.org/web/20111109014246/http:www.isixsigma.com/index.php?option=com_glossary
Data Quality Glossary. A free resource from GRC Data Intelligence. For comments, questions or feedback: dqglossary@grcdi.nl