To define a custom factorial design
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1    Choose Stat > DOE > Factorial > Define Custom Factorial Design.

2    In Factors, enter the columns that contain the factor levels.

3    Depending on the type of design you have in the worksheet, choose 2-level factorial, 2-level split-plot (hard-to-change factors) or General full factorial.

4    By default, for each factor, Minitab designates the smallest value in a factor column as the low level; the highest value in a factor column as the high level.

·    If you do not need to change this designation, go to step 5.

·    If you need to change this designation, click Low/High.

1    Under Type, choose either numeric or text for each factor.

2    Under Low, click in the factor row you would like to assign values and enter the appropriate numeric or text value. Use the arrow key to move to High and enter a value. For numeric levels, the High value must be larger than Low value.

3    Repeat step 2 to assign levels for other factors.

4    Under Worksheet Data Are, choose Coded or Uncoded.

5    Click OK.

5    Do one of the following:

·    If you do not have any worksheet columns containing the standard order, run order, center point indicators, or blocks, click OK in each dialog box.

·    If you have worksheet columns that contain data for the blocks, center point identification (two-level designs only), run order, or standard order, click Designs.

1    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.

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    For two-level factorial designs, if you have a column that contains the center point identification values, under Center points, choose Specify by column and enter the column containing these values. The column must contain only 0's and 1's. Minitab considers 0 a center point; 1 not a center point.

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

5    whole plot IDs

6    Click OK in each dialog box.