A new binary formulation of the restricted Container Relocation Problem based on a binary encoding of configurations
Virgile Galle,
Cynthia Barnhart and
Patrick Jaillet
European Journal of Operational Research, 2018, vol. 267, issue 2, 467-477
Abstract:
The Container Relocation Problem (CRP), also called Block Relocation Problem (BRP), is concerned with finding a sequence of moves of containers that minimizes the number of relocations needed to retrieve all containers, while respecting a given order of retrieval. The restricted CRP enforces that only containers blocking the target container can be relocated. We improve upon and enhance an existing binary encoding and using it, formulate the restricted CRP as a binary integer programming problem in which we exploit structural properties of the optimal solution. This integer programming formulation reduces significantly the number of variables and constraints compared to existing formulations. Its efficiency is shown through computational results on small and medium sized instances taken from the literature.
Keywords: Combinatorial optimization; OR in maritime industry; Integer programming; Container Relocation Problem; Block Relocation Problem (search for similar items in EconPapers)
Date: 2018
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Citations: View citations in EconPapers (16)
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Persistent link: https://EconPapers.repec.org/RePEc:eee:ejores:v:267:y:2018:i:2:p:467-477
DOI: 10.1016/j.ejor.2017.11.053
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