Abstract: For a group decision problem in production planning which regards production quantity as a triangle fuzzy number,a consensus measure is proposed based on products’ priorities and decision makers’ important weights.When the group judgment doesn’t reach consensus on a production planning,it is suggested that decision-makers to be clustered according to the consensus measure for the convenience of aggreating the group’s decision,the aggregation approach for each cluster of decision-maker is also described.At last,an example is given to illustrate the process of our approach.

Key words: group judgment, consensus measure, clustering