Chapter 10
Variability Charts
Variability Chart and Gauge R&R Analysis
A variability chart plots the mean for each level of a second factor, with all plots side by side. Along with the data, you can view the mean, range, and standard deviation of the data in each category, seeing how they change across the categories. The analysis options assume that the primary interest is how the mean and variance change across the categories.
• A traditional name for this chart is a multivar chart, but because that name is not well known, we use the more generic term variability chart.
• A variability chart shows data side-by-side like the Oneway platform, but it has been generalized to handle more than one grouping column.
• Variability charts are commonly ...
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