The management theory jungle is still with us... Perhaps the most effective way [out of the jungle] would be for leading managers to take a more acti… - Harold Koontz

The Decision Theory School : Another approach to management theory, undertaken by a growing and scholarly group, might be referred to as the decision theory school. This group concentrates on rational approach to decision-the selection from among possible alternatives of a course of action or of an idea. The approach of this school may be to deal with the decision itself, or to the persons or organizational group making the decision, or to an analysis of the decision process. Some limit themselves fairly much to the economic rationale of the decision, while others regard anything which happens in an enterprise the subject of their analysis, and still others expand decision theory to cover the psychological and sociological aspect and environment of decisions and decision-makers.

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."

Organization charts are subject to important limitations. A chart shows only formal authority relationships and omits the many significant informal and informational relationships.