Research needs regarding formulation of the initial design problem

Duncker, 1945, On problem solving, Psychological Monographs, Vol 58, 10.1037/h0093599 Maier, 1970 Simon, 1928, Information processing theory of human problem solving, CIF Working Payer Nadler, 1981 Ackoff, 1972 de Bono, 1970 Getzels, 1975, Problem-finding and the inventiveness of solutions, J. Creative Behavior, Vol 9, 12, 10.1002/j.2162-6057.1975.tb00552.x Osborn, 1957 Sakman, 1985, An empirical study on three methods of problem definition in ill-structured situations Nadler, 1982, Profesional engineering education in the classroom, Engineering Education, Vol 72, 781 Warfield, 1976