The methodology of simulation involves a representational approach to observed phenomena. Systems theory has been, in the past, more terminology than theory. However, a logical classification of the possible representational forms available for any simulation would serve as a meta-theory in...

This paper describes the difficulties in evaluating large-scale scientific programs. These difficulties are illustrated through a single case study of the Apollo moon program. The paper describes some of the results of a three and a half year investigation into the beliefs of 42 of the most...

This paper presents a new framework for handling ill-structured decision problems. The framework derives from recent developments in the logic of argumentation. It shows how policy statements may under certain conditions be construed as the outcome of a complex process of argumentation. The...