3-Way Chart Example

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Quality and Process Methods • Control Chart Builder • Additional Examples of the Control Chart Builder • 3-Way Chart Example

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3-Way Chart Example

Three-way 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 Builder.

3.

Drag Fill Weight to the Y role.

4.

Drag Sample to the Subgroup role (at bottom).

Figure 3.26 XBar & R Chart for Fill Weight

Notice that the Range chart (R-chart) plots the ranges of each sample. The limits for the Average (XBar) chart are calculated using the averages in the Range chart.

5.

At bottom left, click 3-Way Chart.

Figure 3.27 3-Way 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 level of wafer in lot ID.

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Help created on 3/19/2020