“Organisation Behaviour is concerned with the study of what people do in an organisation and how that behaviour affects the performance of the organisation.” It is a branch of social science that seeks to build theories that can be applied to predicting, directing & controlling human behavior in an organization. Nature of OB: Interdisciplinary Approach(psychology, sociology, anthropology, etc.) An applied science : Unlike the pure science which concentrate on fundamental research, OB concentrate on applied researches to solve problems of organizations. Normative & value centered(acceptable to the society): OB is a normative science that shows how the various findings of the researches can be applied to socially acceptable organizational goals. Humanistic & optimistic Organizational objectives orientation A total systems approach : It takes into account all the variables such as People, Structure and Technology, affecting organizational functioning.