Modelling policy consequences and evaluation processes using the "deduc" nonnumerical program system

  • Hartmut Bossel
Conference paper
Part of the Lecture Notes in Control and Information Sciences book series (LNCIS, volume 35)


The reality which global models are supposed to model contains many crucial processes (ecological and social development, human decision-making, etc.) which cannot be properly modelled by numerical methods and must be represented by the logical processing of qualitative, nonnumerical information. We have developed, and are using for these purposes, the DEDUC nonnumerical processing system based on the predicate calculus. Elements of the system are briefly described. It has proven itself very useful and reliable in processing large amounts of qualitative data for a) deducing impacts and consequences of events, actions or policies (environmental impact assessment is a typical application) and b) for obtaining impact evaluations from the point of view of given social actors in order to obtain reliable assessments of likely attitudes and behavioral trends concerning given events, actions or policies. Supplementing quantitative global models with qualitative models of relevant non-quantifiable processes would improve their analytical and predictive quality significantly.


Impact Analysis DEDUC System Environmental Impact Assessment Impact Evaluation Object Structure 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.


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Copyright information

© Springer-Verlag 1981

Authors and Affiliations

  • Hartmut Bossel
    • 1
    • 2
  1. 1.GesamthochschuleKasselF.R. Germany
  2. 2.Institut für Angewandte Systemforschung und Prognose (ISP)Medizinische HochschuleD 3 HannoverF.R. Germany

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