Our objective for this second edition of Simio and Simulation: Modeling, Anal- ysis, Applications, as with the first edition, is for it to serve as the primary textin introductory and perhaps second courses in simulation at both the under-graduate and beginning-graduate levels. Such simulation courses are found in departments of industrial and systems engineering, most business schools,and many computer-science departments; simulation courses are also found in other engineering disciplines (mechanical, civil, electrical, chemical), mathe-matics, statistics, epidemiology, and agriculture. The text or components of it could also support a simulation module of a few weeks within a larger sur-vey course in programs without a stand-alone simulation course