Three Way Control Chart Example

Three way control charts are useful when there is variation between batches and variation within batches.

1. Select Help > Sample Data Library and open Quality Control/Vial Fill Weights.jmp.

2. Select Analyze > Quality and Process > Control Chart > Three Way Control Chart.

3. Select Fill Weight and click Y.

4. Select Sample and click Subgroup.

5. Click OK.

Figure 3.26 Three Way Control Chart for Fill Weight 

A Moving Range chart appears between the Range and Average charts. The limits on the Average (XBar) chart are now calculated using the moving range between each sample.

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