Groupthink Results in Defective Decision-making

Groupthink, resulting from the symptoms listed above, results in defective decision-making. That is, consensus-driven decisions are the result of the following practices of groupthinking[6]

1. Incomplete survey of alternatives
2. Incomplete survey of objectives
3. Failure to examine risks of preferred choice
4. Failure to reevaluate previously rejected alternatives
5. Poor information search
6. Selection bias in collecting information
7. Failure to work out contingency plans.

http://en.wikipedia.org/wiki/Groupthink#Symptoms_of_groupthink