quality control chart

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. Synonym(s): Levey-Jennings chart

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.