To define a custom response surface design
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1    Choose Stat > DOE > Response Surface > Define Custom Response Surface Design.

2    In Continuous Factors, enter the columns that contain the continuous factors in the design.

3    In Categorical Factors, enter the columns that contain the categorical factors in the design.

4    Do one of the following:

·    If you do not have any columns containing the blocks, run order, or standard order, click OK.

·    If you have additional columns that contain data for the blocks, run order, or standard order, click Designs.

1    If your design is blocked, under Blocks, choose Specify by column and enter the column containing the blocks.

2    If you have a column that contains the run order of the experiment, under Run Order Column, choose Specify by column and enter the column containing the run order.

3    If you have a column that contains the standard order of the experiment, under Standard Order Column, choose Specify by column and enter the column containing the standard order.

4    Click OK in each dialog box.