A method of decomposing and representing systems in a way that allows designers to test the implications of design concepts is currently under development. This method is based on object oriented programming. It incorporates the concept of nearly decomposable systems (Simon, 1969) and uses the taxonomy of Rasmussen (1979) as a general organizing construct for the clasification of objects. Several general principles of human performance (Card, Moran, and Newell, 1983) are currently being defined implemented as top level objects representing the human component of a system.
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References
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RasmussenJ.On the Structure of Knowledge: A Morphology of Mental Models in a Man-Machine System Context. Riso National Laboratory Report DK-4000, 1979.
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