The aim of this chapter is to promote the concept of design science. This is introduced by a brief definition which is orientated towards the practical values of the subject. The principal contributing sources are then briefly mentioned. The characteristics of a science are detailed, and the scope of design is reviewed in a general manner for the purpose of revealing what appear to be fundamental concepts. The design process is then considered in terms of some of the possible models. The scope of research in design science is outlined in the Appendix to this chapter.