A variable is completely defined (see "Defining a variable") when you have set:
The name of a variable may be up to 256 characters in length. The first character must be a letter of the alphabet; the remaining characters may include numbers, letters, and other characters. Variable names are case sensitive: Var is different from VAR and from vAr etc.
A variable may be independent or dependent. An independent variable is a variable having a value assigned as a fixed value, as a continuous range of values between minimum and maximum limits, or as a set of separate values. A dependent variable is a variable defined based on an expression involving one or more independent variables (up to a total expression length of 256 characters).
You can define a variable using the Spreadsheet or in thefollowing manner:
The Value box contains the current value of the selected parametric dimension, which can also be changed within this Edit Driving Dimension dialog box.