Sounds like an essay question to me.

Computer Aided Drafting and Computer Aided Manufacturing has helped speed the design process in the auto industry. Before computers were used I think the time from concept to production was averaging 5 years, and now it’s possible to turn out a new model in a few months. I believe the current industry average is about 24 months.
Since the design process is streamlined with the use of CAD, a car company can respond to market needs more quickly and efficiently, and also create cars that are more complex with greater accuracy than before. It’s recently even become possible for small-volume models to simulate the National Transportation and Safety Administration vehicle crashes for safety testing in CAD, rather than use actual cars, which saves both time and money.
If you look at the automotive landscape you will notice that most cars designed 10+ years ago were designed (mostly without CAD) to be viewed from either the front or sides, where with modern cars designed in CAD a vehicle can be modeled in 3/4 view to create exteriors that wrap around a car’s corners. Case-in-points would be: Chrysler Crossfire, most all new BMW models, but especially evident in the new 3-series, as well as the upcoming crop of Mercedes products.
Ford is leading the industry with cars that have been designed in CAD down to the smallest component with central files available to suppliers so that refinements can be made much closer to production than before, which, for the consumer, means better cars arriving in the marketplace faster and at more competitive prices.

i don’t know

i really dont know but check it out on the web