POSTER SESSION A STRUCIWRED APPROACH TO ANALYSIS AND DESIGN OF COMPLEX SYSTEMS Frank Evans, South Bank Polytechnic 103 Borough Rd, London SE1 OAA, UK Bitnet/eam/Janet: EVANSF at VAX.SBANK.AC.UK Jan Jan&n, Technical University of Denmark DK-2800 Lyngby, DK Bitnet/eam: STARDU~ at NEUVh41 theory, based on the âdigraph approachâ has been published (Rein&&e, 1988). The poster session will present a digraph model, in which the nodes contain tree-structured, nested data. The oriented arcs display the flow of information. Internally each level of the diagram will be stored in a nested array. The user can draw the diagram directly on screen using a digitiser. The session wilI include live demonstrations of - fault diagnosis on a water tank model of a sewage network - a structured approach to expert system design - interactive graphics for object oriented visual programming (APL2) - frame based data systems (APL2). The demonstrations will emphasize the PC, PS/2 and RT/PC based aids to complexity management. The digraph approach promises speed and space gains due to the purely Boolean array representations, as well as user-friendliness due to automatic decomposition techniques.
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