C chart Example

The Cabinet Defects.jmp sample data table contains data concerning the various defects discovered while manufacturing cabinets over two time periods.

1. Select Help > Sample Data Library and open Quality Control/Cabinet Defects.jmp.

2. Select Analyze > Quality and Process > Control Chart > C Control Chart.

3. Select Type of Defect and click Y.

4. Select Lot Number and click Subgroup.

5. Select Date and click Phase.

6. Click OK.

Figure 3.21 C chart of Type of Defect with Phases 

You can now view the results on the two different days. Both appear to be within limits. To examine other defect type behavior, select another defect type under the Event Chooser > Type of Defect and view the results as the limits are updated.

Want more information? Have questions? Get answers in the JMP User Community (community.jmp.com).