Symbolic Configuration for Interactive Container Ship Stowage Planning

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Low-cost containerized shipping requires high-quality stowage plans. Scalable stowage planning optimization algorithms have been developed recently. All of these algorithms, however, produce monolithic solutions that are hard for stowage coordinators to modify, which is necessary in practice owing to exceptions and operational disruptions. This article introduces an approach for modifying a stowage plan interactively without breaking its constraints. We focus on rearranging the containers in a single-bay section and show two approaches for providing complete and backtrack-free decision support using symbolic configuration techniques, one based on binary decision diagrams and one based on DPLL solvers. We show that binary decision diagrams can be used to solve real-world sized instances of a single bay, and that search-based solvers can be used to solve simplified instances going beyond a single bay.
Original languageEnglish
JournalComputational Intelligence
Publication statusPublished - 3 Jul 2014

Bibliographical note

Note to JCG: Article first published online: 3 JUL 2014. E-pub ahead of print, hence no pagenumbers yet. Can be OK'ed /PFOR 29-05-2015

ID: 80117723