Nominal Group Technique:

The nominal group technique is a decision making method for use among groups of many sizes, who want to make their decision quickly, as by a vote, but want everyone's opinions taken into account (as opposed to traditional voting, where only the largest group is considered) . The method of tallying is the difference. First, every member of the group gives their view of the solution, with a short explanation. Then, duplicate solutions are eliminated from the list of all solutions, and the members proceed to rank the solutions, 1st, 2nd, 3rd, 4th, and so on. The numbers each solution receives are totaled, and the solution with the lowest (i.e. most favored) total ranking is selected as the final decision. There are variations on how this technique is used. For example, it can identify strengths versus areas in need of development, rather than be used as a decision-making voting alternative. Also, options do not always have to be ranked, but may be evaluated more subjectively.
When to use this technique:
• When some group members are much more vocal than others.
• When some group members think better in silence.
• When there is concern about some members not participating.
• When the group does not easily generate quantities of ideas.
• When all or some group members are new to the team.
• When the issue is controversial or there is heated conflict.
As with any technique, there are advantages and disadvantages. NGT is no exception. One major advantage of NGT is that it avoids two problems caused by group interaction. First, some members are reluctant to suggest ideas because they are concerned about being criticized. Second, some members are reluctant to create conflict in groups. (Many people want to maintain a pleasant climate.) NGT overcomes these problems. NGT has the clear advantage of minimizing differences and ensuring relatively equal participation. It may also, in many cases be a time-saving technique. Other advantages include producing a large number of ideas and providing a sense of closure that is often not found in less-structured group methods.
Major disadvantage of NGT is that the method lacks flexibility by only being able to deal with one problem at a time. Also, there must be a certain amount of conformity on the part of the members involved in NGT. Everyone must feel comfortable with the amount of structure involved. Another disadvantage is the amount of time needed to prepare for the activity. There is no spontaneity involved with this method. Facilities must be arranged and carefully planned. Opinions may not converge in the voting process, cross-fertilization, of ideas may be constrained, and the process may appear to be too mechanical.