What are variance components in a gage R&R study?

What are variance components?

Variance components assess the amount of variation contributed by each source of measurement error, plus the contribution of part-to-part variability. The sum of the individual variance components equals the total variation.

What is study variation?

In gage R&R, study variation is the amount of variation caused by the measurement system and by the differences between parts.

Minitab also calculates the percent study variation, so that you can compare the contribution of each component to the total variation.

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