Engineers put very accurate models of new airplanes in wind tunnels to see how aerodynamic they are.
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Agile model is used when the requirements changes very frequently and unpredictability exists i.e. analysis, design, and testing are not predictable (from a planning point of view ) as we might like.
Building a model forces a scientist to think about how the parts of the model interrelate and interact with each other. This may help the scientist to formulate better questions about the real system. In addition it is usually far easier to manipulate a model than it is to make changes to a real system so that the implications of those changes can be studied. Once the scientist believes that they understand the model, or suspects that the model has exhausted its usefulness, they can either build a better model or try testing some hypotheses in the read world.
They will create a model which is similar to that of the dimensions of the prototype. And also the model which is created should hsve same material properties of that of the prototype. And the model can be tested in the laboratory.
For C#, there is no such thing. But if you are the one design/model a messman, then you can put anything you want in messman, whether it is a good design or not become the next question
When scientist creates a representation of a complex process, he is making a model. A model may be physical or conceptual in nature.