Advanced loading constraints for 3D vehicle routing problems

Corinna Krebs (), Jan Fabian Ehmke () and Henriette Koch ()
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Corinna Krebs: Otto von Guericke University Magdeburg
Jan Fabian Ehmke: University of Vienna
Henriette Koch: Otto von Guericke University Magdeburg

OR Spectrum: Quantitative Approaches in Management, 2021, vol. 43, issue 4, No 1, 835-875

Abstract: Abstract Given automated order systems, detailed characteristics of items and vehicles enable the detailed planning of deliveries including more efficient and safer loading of distribution vehicles. Many vehicle routing approaches ignore complex loading constraints. This paper focuses on the comprehensive evaluation of loading constraints in the context of combined Capacitated Vehicle Routing Problem and 3D Loading (3L-CVRP) and its extension with time windows (3L-VRPTW). To the best of our knowledge, this paper considers the currently largest number of loading constraints meeting real-world requirements and reducing unnecessary loading efforts for both problem variants. We introduce an approach for the load bearing strength of items ensuring a realistic load distribution between items. Moreover, we provide a new variant for the robust stability constraint enabling better performance and higher stability. In addition, we consider axle weights of vehicles to prevent overloaded axles for the first time for the 3L-VRPTW. Additionally, the reachability of items, balanced loading and manual unloading of items are taken into account. All loading constraints are implemented in a deepest-bottom-left-fill algorithm, which is embedded in an outer adaptive large neighbourhood search tackling the Vehicle Routing Problem. A new set of 600 instances is created, published and used to evaluate all loading constraints in terms of solution quality and performance. The efficiency of the hybrid algorithm is evaluated by three well-known instance sets. We outperform the benchmarks for most instance sets from the literature. Detailed results and the implementation of loading constraints are published online.

Keywords: 3L-CVRP; 3L-VRPTW; Loading constraints; Load bearing strength; Stability (search for similar items in EconPapers)
Date: 2021
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DOI: 10.1007/s00291-021-00645-w

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