It is entirely possible for the R-chart to show that a process is in statistical control and the -chart to show that the same process is out of control.

Question

It is entirely possible for the R-chart to show that a process is in statistical control and the  -chart to show that the same process is out of control.

Quizplus · Accepted Answer

The R-chart and 11ea7a43_ea20_b179_89bd_75dd8c2db21b_TB3933_00 -chart evaluate different aspects of a process's variation. The R-chart monitors the variability within each subgroup, while the 11ea7a43_ea20_b179_89bd_75dd8c2db21b_TB3933_00 -chart examines the variation between subgroups. Thus, it's possible for one chart to indicate the process is in control, while the other chart shows it's out of control.

It Is Entirely Possible for the R-Chart to Show That