Publication date: 08/13/2020

Threshold of Combined Causes Example

This example uses the Failure.jmp sample data table, which contains failure data and a frequency column. It lists causes of failure during the fabrication of integrated circuits and the number of times each type of defect occurred. A threshold value of 2 is specified for this example.

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

2. Select Analyze > Quality and Process > Pareto Plot.

3. Select failure and click Y, Cause.

4. Select N and click Freq.

5. Select Threshold of Combined Causes and then select Count.

6. Enter 2 as the threshold value.

7. Click OK.

Figure 13.8 Pareto Plot with a Threshold Count of 2 

Figure 13.8 displays the plot after specifying a count of 2. All causes with counts 2 or fewer are combined into the final bar labeled 4 Others.

8. To separate the combined bars into original categories as shown in Figure 13.9, select Causes > Separate Causes.

Figure 13.9 Pareto Plot with Separated Causes 

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