closed available at http://www.kestrel.edu/DAML/CAPACITY.daml 12-14-2000 17:44 becker@kestrel.edu $Id$ Kestrel Scheduling Ontology Capacity The concept of capacity is associated with resources and activities. An activity reserves/uses/requires a certain amount of resource capacity during a certain time interval. By capacity here we mean resource-capacity. Each different type of capacity, defines a different type of resource and a different type of capacity interval. Consumable-Capacity Consumable Capacity is a type of capacity whose value decrease over time and requires same type of producer operation to replenish its value. Money and Fuel are examples of resources that have consumable-capacity. Reusable-Capacity Reusable Capacity is a type of capacity whose value can be used again without the need of replenishment activity. A parking space is an example of a resource having reusable-capacity. Once the vehicle using the space leaves, another one can use the space. Multi-Capacity Multi-Capacity is a type of capacity which availability can be considered under several different perspectives. For example, the same cargo area of a ship, can be loaded by area, by volume, or by number of containers. These different perspectives can interact in non-trivial ways. Complex-Capacity Complex-Capacity is a type of capacity whose availability depends on different types of heterogeneous resource. For example, an airport capacity can be described in terms of its runways, gates, ground crews, refueling equipment, etc.. Capacity-Interval Consumable-Interval Complex-Capacity-Interval Multi-Capacity-Interval The capacity profile represents the capacity availability over time. It can be represented by a list or a sequence of capacity-intervals. Capacity-Profile Entity to support different representations for capacity. The value of the capacity can be represented by an Integer, a Float, or by more complex representations. Capacity-Value Position Entity to represent the location of a movable resource over time Position-Interval Time Interval to represent the location of a resource at a certain time interval This is the temporal profile of the position