| Texto completo | |
| Autor(es): |
De La Vega, Jonathan
;
Gendreau, Michel
;
Morabito, Reinaldo
;
Munari, Pedro
;
Ordonez, Fernando
Número total de Autores: 5
|
| Tipo de documento: | Artigo Científico |
| Fonte: | European Journal of Operational Research; v. 308, n. 2, p. 20-pg., 2023-02-28. |
| Resumo | |
This paper addresses the vehicle routing problem with time windows and stochastic demands (VRPTWSD). The problem is modeled as a two-stage stochastic program with recourse, in which routes are designed in the first stage and executed in the second. A failure occurs if the load of the vehicle is insufficient to meet the observed demand of a customer, implying recourse actions to recover feasibility. We consider the classical recourse policy where reactive trips to the depot are made in case of failures and a fixed rule-based recourse policy where, in addition, preventive trips are allowed. These recourse actions delay the vehicle and may cause further failures if the arrival times on the remaining customers of the planned route do not satisfy their time windows. An additional recourse action is used to service the customers whose time windows would be violated in the planned routes. We propose an Integer L-shaped algorithm considering the mentioned recourse actions. To the best of our knowledge, this is the first tailored exact approach for the VRPTWSD. Computational experiments using 112 benchmark in-stances evaluate the performance of this algorithm as well as the quality of the stochastic problem solu-tions. The results indicate significant savings in the solutions when using the fixed rule-based policy and round-trip recourse actions instead of the classical policy. Additionally, the algorithm performed better with the fixed rule-based policy, solving to optimality all instances with up to 34 customers, and taking less time on instances that were solved to optimality with both policies.(c) 2022 Elsevier B.V. All rights reserved. (AU) | |
| Processo FAPESP: | 18/01523-0 - Benders-branch-and-cut para o problema de roteamento de veículos com múltiplos entregadores e demanda estocástica |
| Beneficiário: | Jonathan Justen de La Vega Martínez |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |
| Processo FAPESP: | 19/23596-2 - Problemas de roteamento de veículos ricos: modelos e algoritmos para variantes determinísticas e estocásticas |
| Beneficiário: | Pedro Augusto Munari Junior |
| Modalidade de apoio: | Auxílio à Pesquisa - Regular |
| Processo FAPESP: | 16/01860-1 - Problemas de corte, empacotamento, dimensionamento de lotes, programação da produção, roteamento, localização e suas integrações em contextos industriais e logísticos |
| Beneficiário: | Reinaldo Morabito Neto |
| Modalidade de apoio: | Auxílio à Pesquisa - Temático |
| Processo FAPESP: | 15/14582-7 - Programação Estocástica e Otimização Robusta para Variantes do Problema de Roteamento de Veículos: Formulações e Métodos Exatos |
| Beneficiário: | Jonathan Justen de La Vega Martínez |
| Modalidade de apoio: | Bolsas no Brasil - Doutorado |
| Processo FAPESP: | 17/06434-3 - Otimização robusta dois estágios com recurso para o problema de roteamento de veículos com janelas de tempo e múltiplos entregadores |
| Beneficiário: | Jonathan Justen de La Vega Martínez |
| Modalidade de apoio: | Bolsas no Exterior - Estágio de Pesquisa - Doutorado |