Activity sub types are the user visible names for the phases or activity templates you have defined. For example for the activity template Phase, you can have a sub type called Planning, or Testing.
To create activity sub types:
Click the Application Configuration tab.
Select the Activity Sub Types link.
Click the Create a New Activity Sub Type button.
Select the activity type from the drop-down menu. For example, Phase.
Enter a name for this activity sub type. For example, you could create a sub type called Requirements Analysis, Planing, Designing, or Testing.
Enter the lower and upper cycle time range (in days). This is the upper and lower duration range for this activity sub type.
