In the design studio, using geodesign as a method, alternatives are given for a certain design/planning problem. By making the alternatives, all students can participate in a common design. There is no discussion about whose design is the best, as often occurs when students give different individual solutions for the same problem, and then start discussing which design is the best. They seldom solve the problem this way. In this case, there is no discussion about the thinking process, because this process is not docu­men­ted. The discussion ends up in a clash of individuals. The experienced designer thinks about a problem and draws a result of this thinking process (black box design: creativity), he often doesn’t need to document the thinking process unless in offices discussion and internal questioning are used as methods (glass box design: rational methods) to strengthen the design and arm the designer before presenting for the com­missioner. Documentation of the thinking process makes possible the discussion even between dis­ciplines. The documentation doesn’t require high drawing skills (either manual or digital). It is a great method to be used in participatory design, because every participant can easily add his or her ideas.