Factorial Designs - Options (2-level
factorial, 2-level split-plot)main topic how to see also
Factorial Designs - Options (2-level
factorial, 2-level split-plot)Stat > DOE > Factorial > Create Factorial Design > Options
Allows you to fold the design, which is a way to reduce confounding, specify the fraction to be used for design generation, randomize the design, and store the design (and design object) in the worksheet.
Fold Design
Do not fold: Choose to not fold the design.
Fold on all factors: Choose to fold the design on all factors.
Fold just on factor: Choose to fold the design on one of the factors, then choose the factor you want to fold on.
Fraction If the design is a fractional factorial, you can specify which fraction to use.
Use principal fraction: Choose to use the principal fraction. This is the fraction where all signs on the design generators are positive.
Use fraction number: Choose to use a specific fraction, then specify which fraction you want to use. Minitab numbers the fractions in a "standard order" using the design generators.
Randomize runs: Check to randomize the runs in the data matrix. If you specify blocks, randomization is done separately within each block and then the blocks are randomized.
Base for random data generator: Enter a base for the random data generator. By entering a base for the random data generator, you can control the randomization so that you obtain the same pattern every time.
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Note |
If you use the same base on different computer platforms or with different versions of Minitab, you may not get the same random number sequence. |
Store design in worksheet: Check to store the design in the worksheet. When you open this dialog box, the Store design in worksheet option is checked. If you want to see the properties of various designs (such as alias tables) before selecting the one design you want to store, you would uncheck this option. If you want to analyze a design, you must store it in the worksheet.