PPT Slide
- Or one is positively reinforced by a substantial list of one's own not yet duplicated ideas and is adding more.
- Few new ideas are generally left for a fourth column and the team is generally mentally exhausted.
- A small student group may take one hour for the first time exclusion; 30 minutes after training.
- On difficult problems, the purge phase will average 8 minutes, and the trigger phase may last 4 hours.
George H. Muller, The Idea Trigger Session Primer, A.I.R. Foundation, Ann Arbor, Michigan, 1973