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X-Bar Range Charts

X-bar & Range Charts are a set of control charts for variables data (data that is both quantitative and continuous in measurement, such as a measured dimension or time). The X-bar chart monitors the process location over time, based on the average of a series of observations, called a subgroup. The Range chart monitors the variation between observations in the subgroup over time.

See also:

When to Use an X-bar / R Chart

Interpreting an X-bar / R Chart

X Bar Chart Calculations

Range Chart Calculations

Use of Specification Limits on an X-bar Chart

Fixed or Varying Subgroup Sizes for X-Bar charts

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