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Demands specify requests for specific quantities of products (or services) within specific time constraints, as well as client-dependent priority information. In other words, demands are used for representing customer orders, move requirements and other external demands to the scheduling system. In the transportation domain, demands are requests for the transportation organization to have something (cargo, people) moved from one place to another.

The basic pieces of information a demand contains are:

In short, demands are a summary of what the underlying system is expected to produce. As an abstraction, demands map requests into sets of constraints.

Ora Lassila
Fri Nov 17 09:52:15 EST 1995