The Destructive-Constructive Brainstorming or Negative-Positive Brainstorming method is a special form of brainstorming. It takes place in two phases and was originally developed at General Electric.
Destructive-constructive brainstorming is very good for incrementally developing existing solutions. In the first phase, the given solution is examined for weaknesses and shortcomings. After that, better solutions are sought for the weaknesses found.