The Asia Simulation Conference (AsiaSim) 2004washeld on Jeju Island, Korea, October 4 6, 2004. AsiaSim 2004 was the third annual conference on simulation in the Asia-Paci?c region. The conference provided the major forum for - searchers, scientists and engineersto present the state-of-the-artresearchresults in the theory and applications of systems modeling and simulation. We were pleased that the conference attracted a large number of high-quality research papers that were of bene't to the communities of interest. ThisvolumeistheproceedingsofAsiaSim2004.Fortheconferencefull-length...