Simulation is the imitation of the operation of a real-world process or system over time. Simulation is one way to understand and explain the underlying processes of a given pattern in a system or the potential patterns associated with processes in a system.
The act of simulating something first requires that a model be developed; this model represents the key characteristics or behaviors/functions of the selected physical or abstract system or process.
The model represents the system itself, whereas the simulation represents the operation of the system over time.
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