*Choose Index below for a list of all words and phrases defined in this glossary.*

**Statistical process control (SPC)** - The application of statistical methods to control processes to provide acceptable Quality_. One component of statistical Quality_ control.

[Category=Data Quality ]

*Source: Larry English, http://www.iaidq.com/main/glossary.shtml , 11-Feb-2009 14:08 *

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**Statistical process control (SPC)** - The application of statistical techniques to control a process; often used interchangeably with the term "statistical Quality_ control."

[Category=Quality ]

*Source: American Society for Quality, 24 October 2010 08:39:21, http://www.asq.org/glossary/ *

**Statistical Process Control (SPC)** - Statistical process control is the application of statistical methods to identify and control the special cause of variation in a process.

Statistical Process Control (SPC) is the equivalent of a histogram plotted on it's side over time. Every new point is statistically compared with previous points as well as with the distribution as a whole in order to assess likely considerations of process control (i.e. control, shifts, and trends). Forms with zones and rules are created and used to simplify plotting, monitoring, and decision making at the operator level. SPC separates special cause from common cause variation in a process at the confidence level built into the rules being followed (typically 99.73% or 3 sigma).

[Category=Data Quality ]

*Source: iSixSigma, 25 February 2011 09:36:59, 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