Bernard Roy, Forty Years of Esteem and Friendship.- Connectivity, Transitivity and Chromaticity: The Pioneering Work of Bernard Roy in Graph Theory.- Decision-Aid Between Tools and Organisations.- Talking About the Practice of MCDA.- Multi-Criteria Decision-Aid in a Philosophical Perspective.- A Characterization of Strict Concordance Relations.- From Concordance/Discordance to the Modelling of Positive and Negative Reasons in Decision Aiding.- Exploring the Consequences of Imprecise Information in Choice Problems Using ELECTRE.- Modelling in Decision Aiding.- On the Use of Multicriteria Classification Methods: a Simulation Study.- Ordinal Multiattribute Sorting and Ordering in the Presence of Interacting Points of View.- Multiattribute Interval Orders.- Preference Representation by Means of Conjoint Measurement and Decision Rule Model.- Towards a Possibilistic Logic Handling of Preferences.- Empirical Comparison of Lottery- and Rating-Based Preference Assessment.- Risk Attitudes Appraisal and Cognitive Coordination in Decentralized Decision Systems.- Logical Foundation of Multicriteria Preference Aggregation.- A Study of the Interactions Between the Energy System and the Economy Using TRIMAP.- Multicriteria Approach for Strategic Town Planning.- Measuring Customer Satisfaction for Various Services Using Multicriteria Analysis.- Management of the Future.- Methodologies for Solving Multi-Obiective Combinatorial Optimization Problems.- Outcome-Based Neighborhood Search (ONS).- Searching the Efficient Frontier in Data Envelopment Analysis.

Zusammenfassung
Organized around two broad themes: Graph Theory with path-breaking contributions on the theory of flows in networks and project scheduling, Multiple Criteria Decision Aiding with the invention of the family of ELECTRE methods and methodological contribution to decision-aiding which lead to the creation of Multi-Criteria Decision Analysis (MCDA).