control chart


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control chart

n
(Statistics) statistics a chart on which observed values of a variable are plotted, usually against the expected value of the variable and its allowable deviation, so that excessive variations in the quality, quantity, etc, of the variable can be detected
References in periodicals archive ?
Segalove, Running Standards in Clinical Chemistry and the Use of the Control Chart, J.
A control chart is used to monitor the behavior of a given process.
Pareto charts, histograms, and control chart use may also point to significant causes.
They also explain which type of control chart is most applicable to a particular process and they complement BS 5702-1:2001--Guide to statistical process control (SPC) charts for variables.
Though the ISRT attribute control chart plots a square root transformed statistic rather than the statistic of interest, the link between the plotted statistic and the statistic of interest is simple to be interpreted.
There are different kinds of control chart such as:
Operators can right-click on any data point of interest and bring up a control chart or histogram.
New pick lists and pop-up windows take users to a specific control chart faster than the previous series of menus.
As we known, Shewhart control chart is based on the supposition that the process is in stationary situation (Montgomery, 1991).
The configuration of a control chart involves a centerline that represents the mean of the data set, and "control limits" that are calculated to represent [+ or -]3 standard deviations (or standard errors of the mean).