Empirical School ; A second approach to management I refer to as the "empirical" school. In this, I include those scholars who identify management as… - Harold Koontz

Every organization structure, even a poor one, can be charted, for a chart merely indicates how departments are tied together along the principal lines of authority. It is therefore somewhat surprising to find top managers occasionally taking pride in the fact that they do not have an organization chart or, if they do have one, feeling that the chart should be kept a secret.

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.

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