Computer-assisted modeling and simulation for time oriented systems

Abstract

Most simulation systems are able to cope with large 'white box' problems, but their application proves to be difficult in case of 'grey box' and 'black box' problems in the social sciences. Even recently developed interactive tools for simulation and structural modeling cannot manage large scale models without difficulties. A computer-aided method is missing for the modeling and simulation of large-scale real-world problems. At the Department of Medical Cybernetics of the University of Vienna Medical School simulation languages and 'modeling tools' are applied in different non-technical fields. First our experience with four systems (CSMP, QSIM3, SPIN, SISSY) is described. A methodological concept is presented for computer-assisted modeling and simulation of time oriented systems. It provides among other features: user defined types of structural elements and relations by means of a meta-definition language; relational networks for the structural representation; defined interfaces between structural representation and processes; support of top-down and bottom-up approaches by incorporation of ordering relationships within the model entities; communication, useability and documentation for the novice and advanced modeler. The aim of the proposed new system is to encourage experimental modeling and simulation of comlex real world problems and to gain an appropriate level of detail. The concepts for the realization are presented.