1.
Exploratory Data Analysis
1.3. EDA Techniques 1.3.3. Graphical Techniques: Alphabetic


Purpose: Interlab Comparisons 
Youden plots are a graphical technique for analyzing
interlab data when each lab has made two runs on the
same product or one run on two different products.
The Youden plot is a simple but effective method for comparing both the withinlaboratory variability and the betweenlaboratory variability. 

Sample Plot 
This plot shows:


Definition: Response 1 Versus Response 2 Coded by Lab 
Youden plots are formed by:


Questions 
The Youden plot can be used to answer the following
questions:


Importance 
In interlaboratory studies or in comparing two runs from the same lab, it is useful to know if consistent results are generated. Youden plots should be a routine plot for analyzing this type of data.  
DOE Youden Plot  The DOE Youden plot is a specialized Youden plot used in the design of experiments. In particular, it is useful for full and fractional designs.  
Related Techniques 
Scatter Plot 

Software  The Youden plot is essentially a scatter plot, so it should be feasible to write a macro for a Youden plot in any general purpose statistical program that supports scatter plots. 