6-3-5 Brainwriting
6-3-5 Brainwriting (or 635 Method, Method 635) is a group-structured brainstorming technique aimed at aiding innovation processes by stimulating creativity developed by Bernd Rohrbach who originally published it in a German sales magazine, the Absatzwirtschaft, in 1968. In brief, it consists of 6 participants supervised by a moderator who are required to write down 3 ideas on a specific worksheet within 5 minutes; this is also the etymology of the methodology's name.