Rapid prototyping is a process in which designer will get physical sample of product. No traditional mould is required. It completes the design validation process very fast. Once physical model is available then checking of model aesthetics, fixing and functionality test can be checked before finalising the final design of model. Any iteration in design is feasible without incurring great cost. In case if you want to conduct beta testing of product before launch then 10 -50 nos pieces can be done with Rapid Prototyping process.
It hastens up overall launching time of any new product.