Control limit: Difference between revisions

Revision as of 19:20, 29 June 2007

Control limits are horizontal lines drawn on an SPC control chart, usually at a distance of ±3 standard deviations from the mean of the plotted statistic.

For normally distributed statistics, the area bracketed by the control limits will on average contain 99.73% of all the plot points on the chart, as long as the process is and remains in statistical control.

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-'''Control limits''' are horizontal lines drawn on a [[control chart]], usually at a distance of ±3 standard deviations from the [[mean]] of the plotted [[statistic]]. For [[normal distribution|normally distributed]] statistics, the area bracketed by the control limits will on average contain 99.73% of all the plot points on the chart, as long as the process is and remains in statistical control.
+'''Control limits''' are horizontal lines drawn on an [[SPC]] [[control chart]], usually at a distance of ±3 [[standard deviation]]s from the [[mean]] of the plotted [[statistic]].
+For [[normal distribution|normally distributed]] statistics, the area bracketed by the control limits will on average contain 99.73% of all the plot points on the chart, as long as the process is and remains in statistical control.
 [[Category:Statistics]]

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Revision as of 19:20, 29 June 2007