Performing Crossed ANOVA Gage R&R Using Excel 365
What you’ll learn
- How to perform Crossed ANOVA Gage R&R using Excel
- How to interpret Crossed ANOVA Gage R&R results
- Understand the basic statistics involved with Gage R&R
- Learn about Standard Deviation, Normal Distribution, F-Distribution, F-Test, Mean Squares, Degrees of Freedom, and P-value
The course presents 7 short videos with supporting downloadable Excel files to teach you the statistics, formulas, and concepts needed to understand how to perform and evaluate a Crossed ANOVA Gage R&R study which is required as part of the PPAP or many Quality Management System processes.
What is Gage R&R?
When to do Gage R&R
When to Repeat Gage R&R
Types of Gage R&R
Methods (Xbar – R vs. ANOVA)
Sum Function (Σ)
Population vs. Sample
Average/Mean (μ or x̅)
Standard Deviation (σ or s)
Variance
Normal Distribution
Galton Board Demonstration
Normal Distribution Probability Density Function (PDF)
Normal Distribution PDF Area Under the Curve
Normal Distribution PDF Probability
68–95–99.7 rule
F-Distribution Introduction
F-Distribution Probability Density Function (PDF)
F-Test
One-Way ANOVA
Null Hypothesis
Calculate F-Statistic and P-Value
One Way ANOVA Using Excel
Two-Way ANOVA Gage R&R Study:
1. Collect data with multiple parts, operators, and replicates (retests)
2. Determine Alpha needed to ignore interaction term and Tolerance
3. Calculate Sum of Squares (SS) and Degrees of Freedom (df) for each group
4. Calculate Mean Squares for each group, (MS) = SS/df
5. Calculate F-Statistics, and P-values then Evaluate Significance of interaction
6. Calculate Variance Components, and Gage R&R Values
7. How to use the built in Two-Way ANOVA data analysis tool.
Interpreting Gage R&R Table:
Variance Components
% Contribution
StdDev(SD)
Study Var (6*SD)
%Study Var (%SV)
%Tol (SV/Tol)
Number of Distinct Categories (ndc)
Heat Map
VarComp Bar Chart
Data by Parts Dot Plot
Range Chart
X-Bar Chart
Boxplot by Operator
Parts x Oper Line Plot
How to Improve Results
Who this course is for:
- Quality and Test professionals
- Anyone who is required to perform or Interpret Gage R&R
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