We perceive design as a creative process and a tool to solve various problems. Design is not a product but the process which helps you deliver a functional product or a smart solution to the world.
Research and development go hand in hand with a creative process and to a certain extent, it gives the direction of what is possible to create in given moment.
Prototyping plays a very strong role and serves as a proofing mechanism for ideas and new technical solutions but at the same time also helps to refine all the ideas around it. Prototyping fundamentally speeds up the development of ideas.