The Cabinet Defects.jmp sample data table contains data concerning the various defects discovered while manufacturing cabinets over two time periods.
|
1.
|
|
2.
|
Select Analyze > Quality and Process > Control Chart Builder.
|
|
3.
|
|
4.
|
A np-chart of Type of Defect appears.
|
5.
|
To change to a c-chart, select Poisson from the Sigma list.
|
|
6.
|
Open the Type of Defect disclosure icon. Note that all of the defect types are listed, but only Bruised veneer is selected and displayed in the chart. You could select additional defect types and the chart would update immediately. Leave it as is for now.
|
Figure 2.20 c-chart of Type of Defect
|
7.
|
Figure 2.21 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 and view the results as the limits are updated.