Shewhart individuals control chart
（重定向自Moving range chart）
![](/Images/godic/202501/28/MR_chart_for_a_paired_individuals_and_MR_chart.svg0402.png")
![](/Images/godic/202501/28/Individuals_chart_for_a_paired_individuals_and_MR_chart.svg0402.png")
In statistical quality control, the individual/moving-range chart is a type of control chart used to monitor variables data from a business or industrial process for which it is impractical to use rational subgroups.
The chart is necessary in the following situations: