Group decision-making offers the following advantages. It is the idea that the whole is greater than the aggregate of its parts. Pin By Fm116 208 Fall2016 Group C On Fm116 Group C Sole Proprietorship Decision Making Flexibility It takes longer for a group to make a decision. . Since the group members have different specialties they tend to provide more information and knowledge. Firstly the involvement of more people ensures that the decision is evaluated. 11 important Advantages of Group Decision-making. There is also a theory which says that the larger a group gets the less is the individual. Group decision making has two advantages over individual decision making. Disadvantages of Group Decision Making. Synergy and sharing of information. All is not good with group decision-making. Advantages of Group Decision-Making. Synergy is the idea that the whole is greater than the sum of its par