Using Westgard Rules

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Using Westgard Rules

  • In 1981, Dr. James Westgard and his associates developed a multi-rule procedure for interpreting control data.
  • Since then, a number of sophisticated quality control schemes or analogues based on this multi-rule logic have evolved.
  • To show how the Westgard Rules may be applied in quality control, three of the most common rejection limits will be illustrated in the following pages.