Average Run Length

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Average Run Length: The mean (average) of the run length. This is the average number of samples that are taken until an alarm is signaled by the control chart.

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Methods are illustrated using SQC Online, Microsoft Excel, and online calculators.

From the Glossary

Shift Size

The purpose of using a control chart is to detect a shift in the process mean, of a specific size. To detect a shift of two standard-deviations-of-the mean, enter the value 2.

Average Run Length

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The Perfect Companion to SQC Online

From the Glossary