Assessment of the Adequacy of Gauge Repeatability and Reproducibility Study Using a Monte Carlo Simulation

Table 3

Variance components, performance metrics, and their decision criteria of the crossed design and the nested design.

	Components	Equation	Crossed design	Nested design	Criteria
Variance	Repeatability
	Reproducibility
	Sample
	Total
	Performance metric	% Study Variation				≤10% acceptable; 10~30% pending; >30% unacceptable
% Contribution					≤1% acceptable; 1~9% pending; >9% unacceptable
% Tolerance					≤10% acceptable; 10~30% pending; >30% unacceptable
Number of distinct category (NDC)					≥5 acceptable; <5 unacceptable