When a client comes to WhiteBoard for the first time, they expect to see our industrial design and engineering capabilities, but they are always amazed when they see how extensive our prototyping capabilities are. Product development is a very iterative process. The ability to quickly create prototypes in our facility enables us to "discover" early and often. It also enables us to quickly validate our designs, and leads to more creative solutions. Combine that with WhiteBoard's collaborative process, and we are able to get our clients' products to market faster and better.
This entertaining video about the "Marshmallow Challenge" does a nice job illustrating why prototyping and collaboration are so important in developing products (i.e., solving problems/designing solutions):