| Discrimination Plot
The Discrimination Plot (or Intraclass Correlation Plot) is not one which is
described in the AIAG MSA manual, but is described in Wheeler & Lyday.
The discrimination plot gives us an immediate picture of the ability of
our measurement system to discriminate between different levels of the
parameter being measured. The
discrimination plot obtained from the AIAG example data set is shown below:
Discrimination Plots are extremely useful in MPE studies:
a discrimination ratio > 4 is generally indicative of a
capable measurement process.
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