In this section, we
define a representation for capturing ranges of usage
both local to the task interval and the depleted usage lasting after
the end of the interval. Based on this we introduce a summarization
algorithm that captures in these ranges the uncertainty represented by
decomposition choices in plans and partial temporal orderings of
plan subtasks. This representation allows a coordinator or
planner to reason about the potential for conflicts for a set of tasks.
We will discuss this reasoning later in Section 4.2.
Although referred to as resources, these variables could be durations or
additive costs or rewards.