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Constraint Programming for LNG Ship Scheduling and Inventory Management

Vikas Goel (vikas.goel***at***exxonmobil.com)
Marla Slusky (mslusky***at***andrew.cmu.edu)
Willem-Jan van Hoeve (vanhoeve***at***andrew.cmu.edu)
Kevin Furman (kevin.c.furman***at***exxonmobil.com)
Yufen Shao (yufen.shao***at***exxonmobil.com)

Abstract: We propose a constraint programming approach for the optimization of inventory routing in the liquefied natural gas industry. We present two constraint programming models that rely on a disjunctive scheduling representation of the problem. We also propose an iterative search heuristic to generate good feasible solutions for these models. Computational results on a set of large scale test instances demonstrate that our approach can find better solutions than existing approaches based on mixed integer programming, while being 4 to 10 times faster on average.

Keywords: Routing, Inventory, Constraint Programming

Category 1: Applications -- OR and Management Sciences (Supply Chain Management )

Category 2: Applications -- OR and Management Sciences (Transportation )

Category 3: Applications -- OR and Management Sciences (Production and Logistics )


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Entry Submitted: 01/22/2014
Entry Accepted: 01/22/2014
Entry Last Modified: 01/27/2014

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