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control chart
(redirected from Shewhart chart)

    Also found in: Encyclopedia, Wikipedia 0.01 sec.
control chart
n
(Mathematics & Measurements / 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
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That work eventually led to the multirule Shewhart Chart that, today, is commonly known as "Westgard Rules.
Westgard's trilogy for analytical QM by Brown, E. Victor / Medical Laboratory Observer
An "overly optimistic' Shewhart chart may result, as illustrated here.
Quality control in the new environment: statistics by Arkin, Charles F. / Medical Laboratory Observer
multi-rule Shewhart chart for quality control in clinical chemistry.
Clinical chemistry by Baer, Daniel M.; Belsey, Richard E. / Medical Laboratory Observer
 
 
 
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