If there are n workers on a project, there are {n2–n}/2 interfaces across which there may be communication, and there are potentially almost 2n teams within which coordination must occur. The purpose of organization is to reduce the amount of communication and coordination necessary; hence organization is a radical attack on the communication problems treated above. The means by which communication is obviated are division of labor and specialization of function. The tree-like structure of organizations reflects the diminishing need for detailed communication when division and specialization of labor are applied.
( Frederick P. Brooks Jr. )
[ The Mythical Man-Month: Essays ]
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