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17. A Simulation/Optimization Framework for Locomotive Planning Nahapetyan, Artyom Ahuja, Ravindra K. Sargut, F. Zeynep John, Andy Somani, Kamalesh Railroad simulation locomotive engine planning In this paper, we give an overview of the Locomotive Simulater/Optimizer (LSO) decision support system developed by us for railroads. This software is designed to imitate locomotive movement across a rail network, and it simulates all four major components of the system; trains, locomotives, terminals, and shops in an integrated framework. It includes about 20 charts that allow evaluating system performance using standard measures. LSO can be used by locomotive management to per- form "what-if" analysis and evaluate system performance for different input data; it provides a safe environment for experimentation. We have tested the software on real data and output showed that the software closely imitates day-to-day operations. We have also performed differ- ent scenario analysis, and reports illustrate that the software correctly reflects input data changes. Schloss Dagstuhl – Leibniz-Zentrum für Informatik Artyom Nahapetyan and Ravindra K. Ahuja and F. Zeynep Sargut and Andy John and Kamalesh Somani 2007 Is Part Of OASIcs, Volume 7, 7th Workshop on Algorithmic Approaches for Transportation Modeling, Optimization, and Systems (ATMOS'07) (2007) InProceedings Text doc-type:ResearchArticle publishedVersion application/pdf doi:10.4230/OASIcs.ATMOS.2007.1182 urn:nbn:de:0030-drops-11820 https://drops.dagstuhl.de/entities/document/10.4230/OASIcs.ATMOS.2007.1182 eng https://creativecommons.org/licenses/by-nc-nd/3.0/legalcode