The R​-Chart at Chart

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The R​-Chart. The range (r) chart monitors the variation in the subgroup range. Used to determine if a process is stable and predictable, it creates a picture of how the system changes over time.

Difference Between X-Bar And R-Chart And How They Are Used | Rop
Difference Between X-Bar And R-Chart And How They Are Used | Rop from www.researchoptimus.com

The format of the control charts is fully customizable. In pareto charts, the right vertical axis is used for cumulative frequency while the left vertical axis represents frequency. It is actually a two plots to monitor the process mean and the process variation over the time and is an example of statistical process control.

Difference Between X-Bar And R-Chart And How They Are Used | Rop

A very similar chart is the s chart. Be sure to plot the data on the r chart and if not in control, before continuing with building the control chart, work to bring the variability of the process under control. Any feedback is highly welcome. Historically, the r charts have been the most commonly used control charts for the process variation, in part because they are the simplest to calculate.