Classifying design by its end product seems to be rather putting the cart before the horse, for the solution is something which is formed by the design process and has not existed in advance of it. The real reason for classifying design in this way has less to do with the design process but instead a reflection on out increases specialized technologies. Engineers are different from architects not just because they may use a different design process but more importantly because they understand about different materials and requirements. Unfortunately this sort of specialization can easily become a strait jacket for designers, directing their metal process toward a predefined goal. It is thus to easy for architects to assume that the solution to a clients problem is a new building. Often it is not!