Because in practice it is not possible to perform an experiment or process modifications to work until they see the benefits to be obtained, such as the Elimination of a problem that is beyond the expectations that arise. To make the manufacturing process more slowly, so the simulation (Simulation) helps to analyze the current condition of the existing system and help find ways or options (Scenario) where appropriate. Before applying to the situation or task, which helps to reduce the risk of crashes or failure. It also helps save both time and expense. (Maria, 1997).
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