JMP 11 Quality and Process Methods

Cause-and-Effect Diagram Overview

Use the Diagram platform to construct cause-and-effect diagrams, also known as Ishikawa charts or fishbone charts. Use these diagrams to:

• Organize the causes of an effect (sources of a problem)

• Brainstorm

• Identify variables in preparation for further experimentation

Example of a Cause-and-Effect Diagram

You have data about defects in a circuit board. You want to examine the major factors and possible causes of the defects in a diagram.

1. Open the Ishikawa.jmp sample data table.

2. Select Analyze > Quality and Process > Diagram.

3. Select Parent and click X, Parent.

4. Select Child and click Y, Child.

5. Click OK.

Figure 12.2 Ishikawa.jmp Diagram

The major factors are Inspection, Solder process, Raw ...