For the latest version of JMP Help, visit JMP.com/help.

The Shirts.jmp sample data table contains data concerning the number of defects found in a number of boxes of shirts.
1.
Select Help > Sample Data Library and open Quality Control/Shirts.jmp.
2.
Select Analyze > Quality and Process > Control Chart Builder.
3.
Drag # Defects to the Y role.
4.
Drag Box to the Subgroup role.
5.
To change the chart to an Attribute chart, select Shewhart Attribute from the drop-down list.
A c-chart of # Defects appears.
6.
Change the Statistic from Count to Proportion to change the chart to a u-chart.
Figure 3.22 u-chart of # Defects

Help created on 3/19/2020