- Task-Goal Decomposition: Subgoal. In this kind of decomposition it is not specified how the goal is to be achieved, allowing alternatives to be considered.
- Task-Task Decomposition: subtask. When a task is specified as a subcomponent of a (higher) task, this restricts the higher task to that particular course of action.
- Task-Resource Decomposition: resourceFor: The entity represented by the resource is not considered problematic by the actor. The main concern is whether it is available (and from whom, if it is an external dependency).
- Task SoftGoal Decomposition: softgoalFor: When a softgoal is a component in a task decomposition, it serves as a quality goal for that task, and thus guides (or restricts) the selection among alternatives in further decomposition of that and other tasks.
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