### Concepts for R&R Studies, Second Edition

#### by Larry B. Barrentine

#### ASQ Quality Press (February 29, 2012)

#### IDEAL AUDIENCE

Someone who needs a brief overview of the practical and statistical sides of Gage R&R, using the minimum of math. The appendices do cover the Math in a bit more detail.

#### REVIEW

Could you conduct a simple gage r&r using just this book?

You probably could using the range method, (the range method is a simple calculation method for r&r studies), but with no other guidelines you may lack confidence in your results.

Even though the ANOVA method is briefly covered, it’s really just a very brief overview, so unless you’re familiar with ANOVA, you might struggle to apply it based on just this book.

If you are not sure where to start this book will help you get going, but it won’t get you all the way.

However, using this book and visiting forums such as this one you should be able to get a simple Gage r&r completed.

There are a few other points to bear in mind if you are thinking of buying this book

This is the latest edition – 2003 – and it’s now almost 10 years old.

The book covers continuous measurement gage r&r studies, not attribute gage R&Rs.

This is a short book – it’s 76 pages long, and the last 25 pages are Appendices.

The author covers a lot of ground in 50 pages, but Concepts for R&R Studies is an appropriate title.

#### SUMMARY

A very good basic overview which uses only the minimum of Math, and addresses a number of practical issues

#### VERDICT

Buy this book if you are new to gage r&r and want a brief, readable overview

*Disclosure:** This website may be compensated for linking to other sites or for sales of products that we link to*

#### TABLE OF CONTENTS

Introduction

Procedures for Performing an R&R Study

Measurement Capability Indices

Planning an R&R Study

What do we do if the results are unacceptable

How do I compare R&R results to the device manufacturer’s specs

Evaluation by Analysis of Variance

What are the relationships of Measurement Capability Indices and Process Capability

Examples of Problems and Procedures

Conclusion

Appendix A: The standard procedure

Appendix B Factors for varying sample size

Appendix C Derivation of Repeatability and K1 and K2 Factors

Appendix D Derivation of the Calculation of Reproducibility

Appendix E How to address variation within a sample

Appendix F Confidence levels in estimating standard deviations

Appendix G Use of Control Charts

Appendix H Relationship of process capability and measurement capability indices

Appendix I The effect of gage r&r on process capability