To start a response surface design, select DOE > Response Surface Design, or click the Response Surface Design button on the JMP Starter DOE page. Then, follow the steps described in the following sections.
Enter Factors into a Response Surface Design
Click Continue to proceed to the next step.
Highlight the type of response surface design you want and click Continue. The next sections describe the types of response surface designs shown in Choose a Design Type.
Choose a Design Type
The response surface design list contains two types of central composite designs: uniform precision and orthogonal. These properties of central composite designs relate to the number of center points in the design and to the axial values:
When you select a central composite (CCD-Uniform Precision) design and then click Continue, you see the panel in Display and Modify the Central Composite Design. It supplies default axial scaling information. Entering 1.0 in the text box instructs JMP to place the axial value on the face of the cube defined by the factors, which controls how far out the axial points are. You have the flexibility to enter the values you want to use.
Display and Modify the Central Composite Design
If you want to inscribe the design, click the box beside Inscribe. When checked, JMP rescales the whole design so that the axial points are at the low and high ends of the range (the axials are –1 and 1 and the factorials are shrunken based on that scaling).
Use the Output Options panel to specify how you want the output data table to appear. When the options are specified the way you want them, click Make Table. Note that the example shown in Select the Output Options is for a Box-Behnken design. The Box-Behnken design from the design list and the Output Options request 3 center points and no replicates.
Select the Output Options
Run Order provides a menu with options for designating the order you want the runs to appear in the data table when it is created. Menu choices are:
Add additional points with options given by Make JMP Table from design plus:
The Design Data Table
The column called Pattern identifies the coding of the factors. It shows all the codings with “+” for high, “–” for low factor, “a” and “A” for low and high axial values, and “0” for midrange. Pattern is suitable to use as a label variable in plots because when you hover over a point in a plot of the factors, the pattern value shows the factor coding of the point.The three rows whose values in the Pattern column are 000 are three center points.
The Y column is for recording experimental results.