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Contour Optimizer and Contour Plot

Now that you have found factor settings that optimize both responses, take a closer look at the response surface with the contour optimizer. The interactive features of the contour optimizer are similar to those of the contour plot described in the section "Viewing Contour Plots from the Fit Window". You can also access contour plots from the Response Optimization window. Follow these steps:

1. Click Contour Optimizer.
2. Select Underlay to underlay the standard error of THCKNESS on the contours.
3. Select Overlay to overlay RESTIVTY contours on the THCKNESS contours.
4. Select Settings Apply Settings From Prediction Profiler. This displays the area of the response surface that is optimal for both responses.

You can interact with the contour optimizer as you did for each contour plot earlier.

Right-click and select Edit overlay levels to add contour lines. To move a contour, position the mouse pointer over a line. The pointer becomes a hand, which can be used to move the line. Clicking the mouse when the pointer is an arrow shows the factor settings and response values at that location.

To create a matrix of contour plots, which is especially useful when dealing with more than two significant effects, follow these steps:

1. Click Contour Plot Change Plot.
2. Select Pairs of factors, and click Next.
3. A single response, THCKNESS, is selected for you. Click Next.
4. TEMP and FLOW are selected for the horizontal axis, and TIME and ETCH are selected for the vertical axis. Click Next.
5. The middle values for factors not displayed are selected by default. Since these values are adequate, click Finish.