As there weren't any defined hierarchical structure within the group, so the individual and authoritarian decision making strategy were inapplicable in this situation. It was rather that we used the consensus decision-making model, as all every member of our group is a professional who has his own views on the problem, and who can make valuable contribution to solving it.
Before making a decision we listened for all of the suggestions the members of our group had, and then we took the most valuable from all of the suggestions we heard. At the end of this stage, everything which we decided was worth attention was written down, and than we developed a strategy of actions according to all the information gathered. Thus the result we got was a result of real group work, but without the biases of the groupthink phenomenon.
One of the characteristic features of group decision making process is that a good process itself doesn't guarantee the good outcome, and, on the contrary, complicated decision making process doesn't always result in a bad decision. Group decision making process is much more complicated than the individual one, due to the fact that there are several people in the group whose views have to be considered when making a decision.