Public needs to know of programs, uncertainties, weaknesses, and how to evaluate claims. A collection of data and equations describing, or simulating, characteristics and behavior of the thing being studies. Allow us to investigate the possible effects of different designs, scenarios, and policies. Have obvious social and economic benefits. Enable us to consider alternatives and make better decision, reducing waste, cost, and risk.
Models are simplifications.
Physical models are not the same size as the real thing. Evaluating models There are both political and technical reasons why models may not be accurate. Also technical reasons. Three questions help determine the validity and accuracy of a model. Car Crash Analysis Programs Background DYNA3D models the interactions of physical objects on impact.