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002
Publications

2020

Integrated planning of inbound and outbound logistics with a Rich Vehicle Routing Problem with Backhauls

Authors
Marques, A; Soares, R; Santos, MJ; Amorim, P;

Publication
Omega

Abstract

2020

A robust optimization approach for the vehicle routing problem with selective backhauls

Authors
Santos, MJ; Curcio, E; Mulati, MH; Amorim, P; Miyazawa, FK;

Publication
TRANSPORTATION RESEARCH PART E-LOGISTICS AND TRANSPORTATION REVIEW

Abstract
The Vehicle Routing Problem with Selective Backhauls (VRPSB) aims to minimize the total routing costs minus the total revenue collected at backhaul customers. We explore a VRPSB under uncertain revenues. A deterministic VRPSB is formulated as a mixed-integer programming problem and two robust counterparts are derived. A novel method to estimate the probabilistic bounds of constraint violation is designed. A robust metaheuristic is developed, requiring little time to obtain feasible solutions with average gap of 1.40%. The robust approach studied demonstrates high potential to tackle the problem, requiring similar computing effort and maintaining the same tractability as the deterministic modeling.

2020

The vehicle routing problem with backhauls towards a sustainability perspective: a review

Authors
Santos, MJ; Amorim, P; Marques, A; Carvalho, A; Povoa, A;

Publication
TOP

Abstract
The vehicle routing problem with backhauls (VRPB) allows to integrate inbound and outbound routes, which is an efficient strategy to reduce routing costs and also to reduce the environmental and social impacts of transportation. In this paper, we analyze the VRPB literature with a sustainability perspective, which covers environmental and social objectives, collaborative networks and reverse logistics. First, to better understand and analyze the VRPB literature, all related works are characterized according to a common taxonomy provided for routing problems. This taxonomy is extended to differentiate between economic, environmental and social objectives. After identification of all VRPB papers that include sustainability issues, these are analyzed and discussed in more detail. The analysis reveals that research on VRPBs with sustainability concerns is recent and relatively scarce and the most popular aspects investigated are the minimization of fuel consumption and CO 2 emissions. Future research lines driven by sustainability concerns are suggested for the VRPB as a promoter of green logistics. © 2019, Sociedad de Estadística e Investigación Operativa.