Brief Introduction
Conduct, analyze & interpret Variable Gage R&R ANOVA method. Compliant to IATF16949 automotive industry requirementsDescription
What you'll learn
The concept of measurement system variation. Common types of measurement errors. Distinguish between accuracy and precision error, repeatability and reproducibility errors. Factors that cause repeatability and reproducibility errors.
The purpose of conducting a Variable Gage R&R. Types of Variable Gage R&R analysis. Benefits of the Variable Gage R&R Analysis of Variance or ANOVA method.
Step-by-step guide on preparation to conduct a Variable Gage R&R study - selection of parts, selection and training of appraisers, method of data collection and data tabulation. Demonstration on Minitab on how to perform Variable Gage R&R ANOVA method.
Analyze and interpret Gage R&R ANOVA report. Gage R&R formulae and Pass/Fail criteria for the gage as per the Automotive Industry Action Group's Measurement System Analysis Reference Manual 4th Edition. Analyze Minitab graphs to obtain better insight on the sources of measurement variation such as appraiser consistency, appraiser to part interaction.
How to troubleshoot an unacceptable gage. Common causes of repeatability and reproducibility errors. Take actions to reduce these errors in order for the gage to pass Gage R&R second time round. Access Minitab Help and Resources for further self-study and practice.
Requirements
Basic knowledge of measurement and variation concept would be helpful but not mandatory.
Description
The concept of variation - part-to-part variation, measurement variation and total variation
Types of measurement variation - accuracy vs precision error.
Types of precision error - repeatability and reproducibility error
Sources of measurement variation
Variable Gage R&R study
Objective of conducting a variable gage R&R study
Types of Variable Gage R&R study
Advantage of the Analysis of Variance (ANOVA) method Gage R&R study
% Gage R&R Formulae - The two formulae for % Gage R&R, when to use which formula.
Step-by-step guide on how to conduct a Variable Gage R&R study ANOVA method using Minitab
Software requirements
Selection of appraisers - criteria for selecting appraisers, preparation and training for appraisers.
Selection of parts - Choice of using masters or production parts, criteria for selecting production parts.
Method of data collection, format required for Minitab worksheet, transferring data from Excel to Minitab.
Demonstration on how to run Variable Gage R&R Study (crossed) on Minitab. (Downloadable resources provided to give student to option to follow along )
Analyze and interpret Minitab Gage R&R report.
Pass/Fail Criteria for % Gage R&R study as per Measurement System Analysis Reference Manual 4th edition which is aligned to automotive industry requirements.
Identify the sources of variation in the Variable Gage R&R Report, analyze the Gage Evaluation table and when the gage fails % Gage R&R identify the dominant source(s) of variation.
Review the number of distinct categories to evaluate the adequacy of instrument discrimination.
Analyze and interpret Minitab charts to evaluate appraiser consistency, adequacy of gage discrimination and part-to-part variation, performance of individual parts, comparison of appraiser performance and appraiser to part interaction.
Troubleshooting and improving an unacceptable gage
Common causes of repeatability and reproducibiility error. Take actions to reduce these errors in order for the gage to pass % Gage R&R second time round.
Additional Help and Resources found in Minitab website and how to access them.
Summary and conclusion
Who this course is for
All engineering, technical, manufacturing and quality personnel involved in gage qualification and maintenance. All owners of measurement systems.
Requirements
- Requirements
- Basic knowledge of measurement and variation concepts would be helpful
Sabrina Lim
2.5 Raiting
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