In simulations, people are confronted with real-life situations and can take risks without having to suffer the consequences of failure. People can experiment with dangerous chemicals on the computer screen, for example, and not be in danger from the actual chemicals. With laboratory simulations, there is no expensive lab equipment to buy and students do not have to wait as long for the results of an experiment. Simulations save time and money, reduce risks, and work well as aids in decision-making.

Physical models such as crash tests are supplemented by computer models and simulations.

A simulation is an abstraction or imitation of a real-life situation or process. Computers can be used to simulate complicated processes such as the spread of a virus throughout a city, the long-term effects of urban renewal, or the economy of an entire country. In simulations, participants usually play a role in...