The RAND Advanced Simulation Language Project's Declarative Modeling Formalism (DMOD)

by Jeff Rothenberg, Sanjai Narain

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This report discusses research by the RAND Advanced Simulation Language (RASL) project. The goal of this project was to develop knowledge-based modeling techniques that integrate simulation and planning in order to answer strategic mobility questions that go beyond the "What if...?" capabilities of traditional simulation: questions such as "Can a given event ever happen?" "Under what conditions will an event happen?" or "How can a desired result be achieved?" The report presents an in-depth description of the Declarative MODeling formalism (DMOD) that was developed by the RASL project. DMOD can be thought of as an attempt to formulate a logical description of the event-scheduling view of discrete-event simulation. Formal proofs of the soundness and completeness of the DMOD approach are presented, along with a number of detailed examples of how to perform modeling using DMOD.

This report is part of the RAND Corporation monograph report series. The monograph/report was a product of the RAND Corporation from 1993 to 2003. RAND monograph/reports presented major research findings that addressed the challenges facing the public and private sectors. They included executive summaries, technical documentation, and synthesis pieces.

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