Gage R&R Destructive Testing with One-sided Tolerance

Jay Arthur
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The MSA 3rd edition manual has a section on destructive MSA's.

In brief, You should select your parts as follows:

1. The samples for Part 1 (that will be repeated by a single operator, and those to be reproduced by another operator) should come from as nearly a homogeneous sample/batch as possible.
2. The samples used as Part 2 should be from a different batch, different production run, or have sufficient time to allow long term variation to occur.
3. Repeat for Part 3, 4, 5, etc.
   

The results will show some variation in equipment because of the variation in destructive tests.

The Gage R&R template will show that 20.7% for the %R&R means that the gage system may be acceptable (given destructive testing has occurred and we can't use the same part twice).

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The QI Macros draws line, pie, bar, pareto, box whisker, histogram (Cp, Cpk), scatter and control charts (with stability analysis).

Templates include the Ishikawa diagram, QFD, DOE, FMEA, PPAP, and Gage R&R for MSA. Performs ANOVA, t-test, F-test, and regression analysis.

To get formulas and a fuller understanding, order the MSA reference from the AIAG:
www.aiag.org

For a complete listing of AIAG books, go to:
aiag/publications

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