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Central Concepts
Despite the enormous exibility of discrete event simulation (DES), a
relatively small number of concepts underlie it (Table2.1). These concepts
are: the events that dene the changes in the entities or in the state of the
model; the entities that experience those events; the attributes that distinguish
individual entities from one another; the explicit handling of resources and
any resulting queues; and, perhaps most distinctively, the running of the
model in continuous time. Other concepts are common across many types of
models, not just DES: the use of information global to the entire model; dis-
tributions that repr ...