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OPSpecs Chart N=4 90% AQA
This is an example OPSpecs chart for a 10% analytical quality requirement with 90% AQA (analytical quality assurance) and with N=4 (4 control measurements).
OPSPECS CHARTS:
10% Analytical Quality Requirement
90% AQA (Analytical Quality Assurance, error detection)
Common control rules with N's of 4