This book constitutes the proceedings of the 6th International Conference on Modeling Decisions
for Artificial Intelligence MDAI 2009 held on Awaji Island Japan in November December 2009.
The 28 papers presented in this book together with 5 invited talks were carefully reviewed and
selected from 61 submissions. The topics covered are aggregation operators fuzzy measures and
game theory decision making clustering and similarity computational intelligence and
optimization and machine learning.
