This year we received a total of 153 high-quality papers from more than 20 countries. Many papers demonstrated notable systems with good analytical and/or empirical analyses. Each paper was reviewed by at least two reviewers (most papers received three reviews each). Based on these rigorous reviews, IES 2014 accepted 106 papers for inclusion in the conference program, which represents an acceptance rate of 69%. All accepted papers will be included in the Proceeding of Adaptation, Learning and Optimization Series published by Springer-Verlag.