Both cognitive and systematic methods of problem solving have strong and weak points. The importance of individual knowledge is crucial in problem solving activities; hence it is important to combine the power of systematic approaches, in order to overcome with efficient processes the boundaries of personal creativity, with the capability of cognitive methods to leverage individual tacit knowledge. Fundamentally, as Pahl and Beitz claimed in [5], ‘‘design methodology should therefore foster and guide the abilities of designers, encourage creativity, and at the same time drive home the need for objective evaluation of the results