Stat > DOE > Modify Design > choose Modify factors > Specify
Allows you to name or rename the factors and assign values for factor settings.
Use the arrow keys to navigate within the table, moving across rows or down columns.
Factor: Shows the number of factors you have chosen for your design. This column does not take any input.
Name: Enter text to change the name of the factors. By default, Minitab names the factors alphabetically.
Type: Shows whether the factor is numeric or text. This column does not take any input.
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.