Simulation and Modelling > Introduction > What is Discrete-Event Simulation?
Discrete-event simulation: Modeling of a system as it evolves over time by a representation where the state variables change instantaneously at separated points in time. More precisely, state can change at only a countable number of points in time
These points in time are when EVENTS occur.
Event : Instantaneous occurrence that may change the state of the system
Discrete-event simulation can in principle be done by hand, but usually done on computer.
Entities :
They are objects that compose a simulation model
E.g. customers and servers
Characterized by data values called attributes
For each entity resident in the model there’s a record
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