SigmaPro Publications

In support of your Lean, Lean Six Sigma, and Design for Six Sigma (DFSS) business transformation efforts, SigmaPro is pleased to provide access to the following technical publications.  These publications include Design for Six Sigma deployment, Design for Six Sigma project identification and selection, Axiomatic Design, requirements definition, multivariate statistical process control, measurement systems analysis, risk analysis, Lean Six Sigma deployment, Lean Six Sigma project identification and selection, and much more.

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Dr. Douglas Mader

January 01, 1999

The Economic Impact of Measurement Error

Interpretation of the results of a gauge repeatability and reproducibility (R&R) study relies on two key metrics -- the combined gauge R&R as a percent of specification and the discrimination ratio. These metrics are useful in terms of the rules of thumb that have been developed over the years, but they fall short of effectively quantifying how well the measurement system will perform in a production environment. For any measurement system, the alpha (or producer’s) risk is defined to be the pr...
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