What Is Modeling and Simulation? 👉 Modeling is a way to create a virtual representation of a real-world system that includes software and hardware. 👉 Simulation is used to evaluate a new design, diagnose problems with an existing design, and test a system under conditions that are hard to reproduce in an actual system. If any components of the system are driven by mathematical relationships, you can model and simulate their virtual representation under a wide range of conditions to see how it