One activity common to all engineering work is problem solution. The problem may involve quantitative or qualitative factors; it may be physical or economic; it may require abstract mathematics or common sense. Of great importance is the process of creative synthesis or design, putting ideas together to create a new and optimum solution of the problem. Since the engineer functions at the socio-technological “interface” (with science and technology on one side and individuals and communities on the other), he bears a unique responsibility to decide on priorities, establish performance criteria, select materials and processes, and specify evaluation procedures.