The Social System School: Closely related to the human behavior school and often confused or intertwined with it is one which might be labeled the so… - Harold Koontz

The Human Behavior School: This approach to the analysis of management is based on the central thesis that, since managing involves getting things done with and through people, the study of management must be centered on interpersonal relations. Variously called the "human relations," "leadership," or "behavioral sciences" approach... This school concentrates on the "people" part of management and rests on the principle that, where people work together as groups in order to accomplish objectives, "people should understand people."

A prominent manufacturer once said that although he could see some use for an organization chart for his factory, he had refused to chart the organization above the level of factory superintendent. His argument was that charts tend to make people overly conscious of being superiors or inferiors, tend to destroy team feeling, and give persons occupying a box on the chart too great a feeling of "ownership"?Another top executive once said that if an organization is left uncharted, it can be changed more easily and that the absence of a chart also encourages a competitive drive for higher executive positions on the part of the uncharted middle-management group.

The Mathematical School ; Although mathematical methods can be used by any school of management theory, and have been, I have chosen to group under a school those theorists who see management as a system of mathematical models and processes. Perhaps the most widely known group I arbitrarily so lump are the operations researchers or operations analysts, who have sometimes anointed themselves with the rather pretentious name of "management scientists." The abiding belief of this group is that, if management, or organization, or planning, or decision making is a logical process, it can be expressed in terms of mathematical symbols and relationships. The central approach of this school is the model, for it is through these devices that the problem is expressed in its basic relationships and in terms of selected goals or objectives.