The 20th International Conference on Multiple Criteria Decision Making explores the evolving landscape of MCDM in the 21st century. This collection of papers, presented at the 2009 Chengdu conference, addresses the latest theoretical advancements and practical applications of Multiple Criteria Decision Making. It covers a range of methodologies and their use in complex decision-making scenarios across various fields, reflecting the state-of-the-art in research and practice.

The proceedings of the International Conference on Multiple Criteria Decision Making typically serve as a valuable resource for researchers and practitioners in the field. The focus on the 'new state' suggests a forward-looking perspective on the discipline's development. The inclusion of diverse applications indicates the broad relevance of MCDM in addressing contemporary challenges.