Manufacturers can get closer than ever before to the finished result before prototypes roll into a wind tunnel or onto a test track. Computer-aided design (CAD) and computer-aided engineering (CAE) for designing and simulating the performance of products changed things entirely, with the inevitable consequence that cars can now be engineered, prototyped and tested in a virtual world before any physical prototypes are built. The constant back and forth between drawing board and prototypes was costly and enormously time-consuming. Traditional prototyping was a slow and expensive process because, even with the best engineers, theory wasn’t always borne out in practice. Prototypes can be individual parts or complete cars, and once they’re built, they can be put through their paces to see how well they do and, in some cases, tested to destruction if necessary.
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