01 For more on brainwriting, specifically the 6-3-5 method, see Rohrbach, B. (1969). “Kreativ nach Regeln – Methode 635, eine neue Technik zum Lösen von Problemen.” Absatzwirtschaft 12: 73–53.
In brainwriting,  individual participants work in parallel and in silence, writing their own ideas or observations on pieces of paper which are put to one side or passed on to the next writer. This method produces more ideas and far more diversity than brainstorming, but develops less energy as it is more quiet and thoughtful. Use it when ideas are more complex, when diversity is key, to empower less extroverted participants, or where the group is too large for brainstorming to be practical.