Control limit: Difference between revisions
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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 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. | ||
[[Category:Statistics]] | |||
[[Category:Management]] | |||
[[Category:Measurement]] | |||
[[Category:Quality]] | |||
[[Category:Quality control]] | |||
[[Category:Evaluation methods]] | |||
[[Category:Process management]] | |||
Revision as of 19:19, 29 June 2007
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 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.