1. Guest Editorial

   • Philippe Codognet
   • Francesca Rossi

   Editorial Introduction Pages: 5 - 7

2. Current Approaches for Solving Over-Constrained Problems

   • Pedro Meseguer
   • Noureddine Bouhmala
   • Martí Sánchez

   OriginalPaper Pages: 9 - 39

3. A Foundation of Solution Methods for Constraint Hierarchies

   • Hiroshi Hosobe
   • Satoshi Matsuoka

   OriginalPaper Pages: 41 - 59

4. Weighted Constraint Aggregation in Fuzzy Optimization

   • U. Kaymak
   • J. M. Sousa

   OriginalPaper Pages: 61 - 78

5. General Properties and Termination Conditions for Soft Constraint Propagation

   • S. Bistarelli
   • R. Gennari
   • F. Rossi

   OriginalPaper Pages: 79 - 97