... of relationships, share common goals, and perceive them as being a group". (Ref02) While the group behavior is the study of the structure, functioning and performance of the group or organization and the behavior of the individuals within them. Normally people join the groups because of the factors like Common goal, security, power, similar ethnic background, shared responsibility, self-esteem and status. Performance and productivity of different types of groups A group may appear by many other reasons like similarity of culture, values society and common enemy etc. These kinds of groups are called informal groups. And informal groups are again divided into two subgroups i.e. interest and friendship group. Informal groups can be for any interval of time. Sometimes these groups last for lifetime i.e. friendship and sometime for very short period i.e. interest. These groups develop by the personal efforts of individuals. And may not have a specific goal to be ...

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