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Z lt - Z long term (ZLT) is the Z bench calculated from the overall standard deviation and the average output of the current process. Used with continuous data, ZLT represents the overall process capability and can be used to determine the probability of making out-of-spec parts within the current process.
[Category=Data Quality ]
Source: iSixSigma, 06 March 2011 09:53:50, 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