<?xml version="1.0" encoding="UTF-8"?><xml><records><record><source-app name="Biblio" version="6.x">Drupal-Biblio</source-app><ref-type>10</ref-type><contributors><authors><author><style face="normal" font="default" size="100%">Ramos, Tania Rodrigues Pereira</style></author><author><style face="normal" font="default" size="100%">Gomes, Maria Isabel</style></author><author><style face="normal" font="default" size="100%">Barbosa-póvoa, Ana Paula</style></author></authors></contributors><titles><title><style face="normal" font="default" size="100%">Solving a multi-product, multi-depot vehicle routing problem by a hybrid method</style></title><secondary-title><style face="normal" font="default" size="100%">Livro de actas do 15º congresso da APDIO, IO2011</style></secondary-title></titles><keywords><keyword><style  face="normal" font="default" size="100%">hybrid method</style></keyword><keyword><style  face="normal" font="default" size="100%">multi-depot</style></keyword><keyword><style  face="normal" font="default" size="100%">multi-product</style></keyword><keyword><style  face="normal" font="default" size="100%">recyclable</style></keyword><keyword><style  face="normal" font="default" size="100%">vehicle routing</style></keyword><keyword><style  face="normal" font="default" size="100%">waste collection system</style></keyword></keywords><dates><year><style  face="normal" font="default" size="100%">2011</style></year></dates><urls><related-urls><url><style face="normal" font="default" size="100%">https://docentes.fct.unl.pt/sites/default/files/mirg/files/2011_ramosgomesbarbosapovoa_io2011.pdf</style></url></related-urls></urls><pub-location><style face="normal" font="default" size="100%">Coimbra, Portugal</style></pub-location><pages><style face="normal" font="default" size="100%">261-273</style></pages><language><style face="normal" font="default" size="100%">eng</style></language><abstract><style face="normal" font="default" size="100%">&lt;p&gt;This paper is focused on the delimitation of service areas and on vehicle routes definition in recyclable waste collection systems with more than one depot. Three types of materials have to be collected in separated routes, so the problem is modelled as a multi-product, multi-depot vehicle routing problem. A hybrid method is developed where a MIP solver is embedded inside a heuristic framework. The effectiveness of this method is tested by comparing the results obtained for some test instances when solved only by an exact formulation. The hybrid method is then applied to a medium size problem based on a real recyclable waste collection system.&lt;/p&gt;
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