Factorial Design - Factors (2-level factorial, split-plot, or Plackett-Burman design)
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Stat > DOE > Factorial > Create Factorial Design > Factors

Allows you to name or rename the factors and assign values for factor levels. If your factors could be continuous, use numeric levels; if your factors are categorical, use text levels. Continuous variables can take on any value on the measurement scale being used (for example, length of reaction time). Categorical variables can only assume a limited number of possible values (for example, type of catalyst).

Use the arrow keys to navigate within the table, moving across rows or down columns.

Dialog box items

Factor: Shows the number of factors you have chosen for your design. This column does not take any input. For split-plot designs, hard-to-change factors are denoted with HTC.

Name: Enter text to change the name of the factors. By default, Minitab names the factors alphabetically, skipping the letter I.

Type: Choose to specify whether the levels of the factors are numeric or text. For information on how Minitab handles center points when you have a combination of text and numeric factors, see Adding center points.

Low: Enter the value for the low setting of each factor. By default, Minitab sets the low level of all factors to -1. Factor settings can be changed to any numeric or text value. If one of the settings for a factor is text, Minitab interprets the other setting as text.

High: Enter the value for the high setting of each factor. By default, Minitab sets the high level of all factors to +1. Factor settings can be changed to any numeric or text value. If one of the settings for a factor is text, Minitab interprets the other setting as text.