Stat > DOE > Factorial > Define Custom Factorial Design
Use Define Custom Factorial Design to create a design from data you already have in the worksheet. For example, you may have a design that you created using Minitab session commands, entered directly into the Data window, imported from a data file, or created with earlier releases of Minitab. You can also use Define Custom Factorial Design to redefine a design that you created with Create Factorial Design and then modified directly in the worksheet.
Define Custom Factorial Design allows you to specify which columns contain your factors and other design characteristics. After you define your design, you can use Modify Design, Display Design, and Analyze Factorial Design.
Factors: Enter the columns that contain the factor levels.
2-level factorial: Choose if all of the factors in your design have only two levels.
2-level split-plot (hard-to-change factors): Choose if all of the factors in your design have only two levels and your design includes at least one hard-to-change factor.
General full factorial: Choose if any of the factors in you design have more than two levels.
Factors from above that are hard to change: Enter the columns that contain the levels for the hard-to-change factors.
<Low/High> (2-level factorial and 2-level split-plot designs only)