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.

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.
References in periodicals archive ?
The monitoring performed by the quality control chart, as in Figure 2, shows the variability existing between the types of water and lateral line slope in a temporal context.
We used a quality control chart to determine the number of experiences required by an experienced laparoscopic gynecologist to achieve performance stability for the three different stages of robotic surgery.
The Quality Control Chart module of the WinQSB software provides 21 types of graphs for variable data, 15 types of graphs for attributive data, histograms, Pareto analysis, curves of the operational characteristics etc (Mihalca et al., 2003).
The quality control chart and cause-and-effect diagram were placed on the wall where team members who understand the process could ask questions and generate action items to define the root cause and create a process of continuous improvement.
The templates described in this article employ a pseudo-graphics technique for rapidly generating either a blank three-level Levey-Jennings quality control (QC) chart or a blank two-level Westgard quality control chart on a single 8.5-by-11-inch sheet of paper.
It was hypothesized that linking the engineering part drawing to the statistical quality control chart would result in a more useful and usable depiction of the state of the manufacturing process and its relationship to the physical features of the component, and that this depiction would enable the operator to make better quality control decisions in less time.
Statistical quality control charts are useful in establishing process capability, so plant standards may be set for control variables, and upper and lower control limits may be applied.
Many manufacturing firms still suffer from poor quality of manufactured goods in spite of using quality control charts for over a decade.
The QC Charting feature allows laboratories to quickly and easily prepare quality control charts from results, as well as store customized templates for future use, without purchasing additional third-party software.
Inspectors can instantly call up quality control charts to be sure production is within control limits.
Data collected from 10 participants, 174 trials, and 23 performance measures were analyzed using 18 variations of three different quality control charts. Additionally, the data represent performance under space microgravity or antihistamine conditions.
Squires, F.H., "What do quality control charts control?", Quality, November 1982, p.
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