A discrete resource represents a resource of finite capacity, which is defined to be a positive integer number. The capacity of a discrete resource can vary with time. At any time t, the capacity represents the number of copies or instances of the resource that are available. Each activity in a schedule may require some amount of the capacity of a discrete resource.
The two examples in this chapter illustrate two ways in which discrete resources can be used. In the first example we use a discrete resource to model two identical workers, one of which is required by each of the activities in the problem. The second example shows how a discrete resource can be used to model a consumable resource.
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