One strand of my research has been concerned with the computer as a design tool; but a second strand has been concerned with design computing as a research tool for improving our understanding of the design process. Some of this latter research is based on the simulation of computer behaviour by human beings - a reversal of the more usual approach - and some is based on comparisons of computational models with human design behaviour. Despite recent doubts expressed by some authors, I suggest that the question, 'Can a machine design?� is still a useful question to ask
