ces within a system tend to counteract each other, a process known as feedback which forces the system back into equilibrium after being disturbed by external forces (homeostasis). Stated another way, changes in one part of the system affect other parts or the whole (system trying to reach equilibrium). (Bertalanffy, 1972).
H. Unless a continuous source of energy is focused on an activity, energy within a system will dissipate and become random (entropic).
Campbell proposes that systems, and therefore programs, reflect the necessity of processes evaluation. The first, and most important, is to develop an acceptance of the concept of General Systems Theory. This process involves starting from observation and arriving at the construction of systems models, as shown in the Chinese taxonomy that began this paper, and in the categorizing works of Aristotle. Such activities and processes constitute the first stage of developing a systems model. A systems model is useful as a referent that can be examined and studied in an attempt to create an understanding
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