When designers create and develop new or improved products, their designing method is based on a trial and error processes. In the course of the design process, the designer will generate solutions without the guarantee that these will work. By testing the solution, designers experiment ('trial'). However, sometimes, the idea does not work ('error'). When the idea does look viable, the designer is one step closer to the goal. This book provides insight into the design process and offers a manual for product design with a minimum of errors. Among others, the following topics will be discussed: formulation of the product idea, systematic approach of the design process, requirement definition, market research, functionality and meaning, form and color, usage research, ergonomics, techniques for finding innovative solutions, intellectual property, presentation, and reporting. Product Design is based on theoretical knowledge developed at the University of Twente, as well as on the authors' practical experience. The book will be useful for students of industrial design and industrial product development. Moreover, Product Design offers interesting insights for marketing managers, product managers, industrial design engineers, and market researchers who are directly or indirectly involved in the development of (industrial) products.