An excellent leader is crucial for a team's triumph. He/She should be a nice person who everyone wants to work with. And it is definite that, the leader of team should try his/her best to let the team members feel that they have contributed to the final decision, since they could be more active, meanwhile, the decision would be faultless.
 The method of decision making directly affects the efficiency of a team. When the decision was made only by the leader or a limited people in the team, others will just passively execute this decision, they would lose their passion. However, if all the members in the team feel that they participate in the process of decision making, they would consider the decision as their own decision. The enthusiasm of executing would be sparked. Thus, the efficiency of execution would be much greater. For instance, actually one of my leaders was a dictator. He always just made his own decisions. We would not protest that even we could easily find out an obvious flaw, since even we objected to the decision the leader would not consider. So we just passively do what the manager what us to do. The process of  projects was very slow, and usually paused.
 Everybody makes errors as we known, so even the leader who is the person at the peak of a team makes errors too. How about the situation that of a whole team, whole team participates in the decision making process. In my opinion, it would be better by reason of every member of the team could decrease the possibility of making errors. They experienced different lives thus they have a different view of the world. Even they could not propose a constructive suggestion, they could readily find the errors in the decision. This may be the meaning of a team, members could share their experience to guarantee the decision is faultless. As for my last company, we usually did this. When we wanted to make a decision, the leader would congregate all of us to a conference room. We could speak out our own perspectives freely. I must acknowledge that, some details I've never minded was suspected by the experienced colleagues, cause they have fallen down on those minute details.
Even though it is a little bit time-consuming when all the members participate in the decision making process. Comprehensively comparing the efficiency, nevertheless, it is worthwhile to do as a brilliant leader.