'Six Thinking Hats' is an important and powerful technique. It is used to look at decisions from a number of important perspectives. This forces you to move outside your habitual thinking style, and helps you to get a more rounded view of a situation. This tool was created by Edward de Bono in his book '6 Thinking Hats'.
Für eine detailliertere Besprechung gibt es die Site mindtools.com.