Simulations (and models, too) are abstractions of reality. Often they deliberately emphasize one part of reality at the expense of other parts. Sometimes this is necessary due to computer power limitations. Sometimes it's done to focus your attention on an important aspect of the simulation.Simulations generally come in three styles: live, virtual and constructive. The definition of a simulation is a model or representative example of something. When you create a computer program that is intended to model flying a plane, this is an example of a simulation.Simulation methods are ways to imitate of the operation of real-world systems. ... When the computer program is run, the resulting mathematical dynamics form an analog of the behavior of the real system, with the results presented in the form of data lists or images representing predicted outcomes