Close this search box.

Select Starting Point for the Chart Help

Suppose you have a control chart with 20 data points. The process has changed and you want to start the control chart at the point where the process changed. Suppose this point 11. You can delete the data for points 1 to 10 in your worksheet and then update the control chart. However, you probably would like to keep that data as a historical record. In this case, you can use the “Select the subgroup (sample) identifier at which to start the chart” option from the Control Chart Actions form.

To see how this is done, we will use the dataset from the Split Control Limits page. The X control chart for that dataset is shown below.

You would like to start the control chart a point 11. You do this by following these steps:


Scroll to Top