Excerpted from _Group Leadership and Decision Making: Workbook_, 
Copyright 1981 by William Gellermann. All rights reserved. [reprinted 
without permission]
Decisions cannot always meet with everyone's complete agreement, but 
many decisions can be made _acceptable_ so that everyone is at least 
willing to go along. This means that no one has any disagreement that they 
consider important. A decision that is acceptable to every is called a 
_consensus decision_.
Some key guidelines for consensus decision making are:
1.      Approach the decision on the basis of logic and reason.
2.      Listen to other people's ideas and understand their reasoning.
3.      Describe your reasoning briefly so other people can understand you.
        Avoid arguing for your own judgments and trying to make other people 
        change their minds to agree with you. (They can change their own
        minds.)
4.      Avoid changing your mind only to reach agreement and avoid conflict.
        Do not "go along" with decisions until you have resolved
        disagreements you consider important.
5.      View differences of opinion as helpful rather than harmful.
6.      Avoid conflict-reducing techniques such as majority vote.
Acting according to consensus guidelines enables a group to take advantage 
of all group members' ideas. By combining their ideas, people can often 
create a higher-quality decision than a vote decision or a decision by a 
single individual. Further, consensus decisions can be better than vote 
decisions because voting can actively undermine the decision. People are 
more likely to implement decisions they accept, and consensus makes 
acceptance more likely.
Often, other kinds of decision (such as people deciding alone, managers 
deciding, voting) are better than consensus, but when consensus is likely to 
be most effective, people need to know how to reach it.
In summary, consensus decisions can be better than other kinds because 
they enable groups to achieve higher-quality decisions (when pooling 
knowledge is desirable) and higher commitment to action (when acceptance 
of the decision is necessary for effective implementation). However, 
consensus is not always the best way to make a decision.
LEADERSHIP AND GROUP DECISION MAKING
CONTROL <-------------DIALOGUE-------------> SELF-DIRECTION
Leader  Leader and group discuss and then...    Group
decides                                                 decides
                Leader          Both            Group
                decides         decide  decides
                See below for kinds of group decision that can be used in
                making any of these group decisions.
Kinds of Group Decision
Unanimous agreement:  Everyone agrees with the decision.
Pure consensus:  Everyone accepts the decision even though they all may not 
completely agree; they are all willing to go along.
Working consensus:  The decision is accepted by the people whose 
cooperation is necessarty to make it work
Majority decision: More than half agree or are willing to accept the 
decision.
Some Difficulties with Consensus
1.  People who do not actively try to find a decision that is acceptable to 
everyone (all-win) can dominate a group's dicussion by trying to make 
everyone else go along with them (win-lose).
2.  A group can coerce or manipulate individuals into saying they accept a 
decision, even when they don't.  That is groupthink, not true consensus.
3.  People sometimes expect to use consensus even when leader decision, 
voting, or some other method would be better.
Consensus and "groupthink" are different. Groupthink occurs when everyone 
agrees with a decision, but some people are just going along because they 
feel obligated to reach an agreement and avoid conflict. Thus although there 
appears to be a consensus, some people have not resolved disagreements 
they consider important.  In consensus, all agree with the decision and all 
important disagreements are resolved.