Section 1: Conceptual Bases for System Modelling and Design -- 1: Model-Based Activities: A Paradigm Shift -- 2: System Paradigms as Reality Mappings -- 3: General Systems Framework for Inductive Modelling -- 4: System Theoretic Foundations of Modelling and Simulation -- 5: The Tricotyledon Theory of System Design -- 6: Concepts for Model-Based Policy Construction -- Section 2: Model-Based Simulation Architecture -- 7: Structures for Model-Based Simulation Systems -- 8: Symbolic Manipulation of System Models -- 9: Concepts for an Advanced Parallel Simulation Architecture -- Section 3: Impact of Formalisms on Model Specification -- 10: GEST-A Modelling and Simulation Language Based on System Theoretic Concepts -- 11: Continuous and Discontinuous-Change Models: Concepts for Simulation Languages -- 12: Discrete Event Formalism and Simulation Model Development -- Section 4: Model Identification, Reconstruction, and Optimization -- 13: Structure Characterization for I11-Defined Systems -- 14: Reconstructability Analysis: An Overview -- 15: SAPS-A Software System for Inductive Modelling -- 16: Optimization in Simulation Studies -- Section 5: Quality Assurance in Model-Based Activities -- 17: Quality Assurance in Modelling and Simulation: A Taxonomy -- 18: How to Enhance the Robustness of Simulation Software -- 19: Simulation Model Validation -- 20: Critical Issues in Evaluating Socio-Economic Models -- Section 6: Contributed Workshop Presentations -- Group 1: Model-Based Simulation Architecture -- Group 2: Impact of Formalisms on Model Specification -- Group 3: Model Identification, Reconstruction, and Optimization -- Group 4: Quality Assurance in Model-Based Activities.