Human beings are hard-wired for bad decision making in complex situations.
We hone in on answers before examining all the facts, and then seek evidence to confirm our answers.
We are adversely influenced by emotion, loyalties, and group think.
However, decision making can be improved when we encourage conflict and question our assumptions.
A devil’s advocate review should be built in early to the strategy process, and again at the key design stages and when near completion for a last chance to review the full strategy.
http://www.evolvingexcellence.com/blog/2010/03/listen-to-the-naysayers.html