Levey-Jennings chart

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qual·i·ty con·trol chart

a chart illustrating the allowable limits of error in laboratory test performance, the limits being a defined deviation from the mean of a control serum, most commonly ± 2 SD.
See also: quality control.

qual·i·ty con·trol chart

(kwahl'i-tē' kŏn-trōl' chahrt)
A chart illustrating the allowable limits of error in laboratory test performance, the limits being a defined deviation from the mean of a control serum, most commonly ±2 standard deviations.
Synonym(s): Levey-Jennings chart.

Levey-Jennings chart

(lev′ē-jen′ingz)
[S. Levey, 20th-cent. U.S. statistician; E.N. Jennings, 20th-cent. U.S. statistician]
A graphical representation of control data, arranged in chronological order, that shows a mean or target value and one or more sets of acceptable limits.
References in periodicals archive ?
That requirement can actually be taken one step further by plotting daily (or any other periodicity) values on a Levy-Jennings graph for ease of analysis and the ability to treat those values as yet another control in the QC system.