Actions are defined per resource type. A resource type is a part of the product that can have user actions that are restricted by role. IBM UrbanCode Release has several resource types, such as release, and application model. You define the actions that a role can take for each resource type when you create the role. A role can have any or all actions that are granted to it.
Teams are collections of users that are grouped around a shared activity. Teams have access to particular resources (taken from the various resource types).
Finally, before a user can perform any meaningful activity, the user is assigned to a role on a team. The role defines the actions available to the user, and team membership determines the actual resources on which the actions can be applied.