Be sure that Minitab knows where to find your downloaded macro. Choose . Under Macro location browse to the location where you save macro files.
If you use an older web browser, when you click the Download button, the file may open in Quicktime, which shares the .mac file extension with Minitab macros. To save the macro, right-click the Download button and choose Save target as.
For a factorial design with text factors use the coded levels -1 for low and +1 for high. For a central composite design, the low and high levels are for the cube points and the factors are assumed to be continuous.
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The D-optimal design is stored in the same worksheet as the factor name and level columns beginning in columns C4 and beyond. Any data stored in these columns before the macro is run may be lost.
If a 2-level factorial base design is selected, when analyzing the experiment in Terms list and select Include terms up through order 2.
, click theThe Initial D-Optimal design is generated by Sequential Optimization. The Exchange method with 1 exchange point is employed for Improving the Initial Design.