Visual guide Rules, graphs and statistics
QualiChart editorial team
A roadmap for recognizing deviation, hypothesizing, executing interventions, recording the investigation, verifying controls, evaluating new data, and documenting the conclusion.
The poster distinguishes persistent change and increasing trend of dispersion. Use these behaviors as a starting point for investigation; a rule alone does not identify the cause.
Rules, graphs and statistics
Understand the sigma metric, calculate with TEa, bias and CV and take care to interpret analytical performance.
· 3 min read
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Rules, graphs and statistics
Organize a performance verification script before incorporating or changing a method into the laboratory routine.
· 3 min read
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Rules, graphs and statistics
Learn to interpret Westgard's multiple rules to identify systematic and random errors in the laboratory's Internal Quality Control.
· 9 min read
Read moreYour next step in quality control
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