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The first objective function aims to minimize traveled distance and the second objective function minimizing working duration. Since the problem is NP-hard, optimal solution for the instances of realistic size cannot be obtained within a reasonable amount of computational time using exact solution approaches. Hence, the hybrid approach based on LP metric method and genetic algorithm is proposed to solve the given problem.<\/jats:p>","DOI":"10.4018\/ijoris.2018100104","type":"journal-article","created":{"date-parts":[[2018,8,29]],"date-time":"2018-08-29T12:11:22Z","timestamp":1535544682000},"page":"51-67","source":"Crossref","is-referenced-by-count":13,"title":["A Hybrid Approach Based on LP Metric Method and Genetic Algorithm for the Vehicle-Routing Problem with Time Windows, Driver-Specific Times, and Vehicles-Specific Capacities"],"prefix":"10.4018","volume":"9","author":[{"given":"Ebrahim","family":"Asadi-Gangraj","sequence":"first","affiliation":[{"name":"Babol Noshirvani University of Technology, Babol, Iran"}]},{"given":"Sina","family":"Nayeri","sequence":"additional","affiliation":[{"name":"Babol Noshirvani University of Technology, Babol, Iran"}]}],"member":"2432","reference":[{"key":"IJORIS.2018100104-0","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejor.2011.07.037"},{"key":"IJORIS.2018100104-1","doi-asserted-by":"publisher","DOI":"10.1016\/j.cor.2009.02.008"},{"key":"IJORIS.2018100104-2","doi-asserted-by":"publisher","DOI":"10.1287\/trsc.1030.0056"},{"key":"IJORIS.2018100104-3","doi-asserted-by":"publisher","DOI":"10.1287\/trsc.1030.0057"},{"key":"IJORIS.2018100104-4","doi-asserted-by":"publisher","DOI":"10.1016\/j.cor.2008.01.006"},{"key":"IJORIS.2018100104-5","doi-asserted-by":"publisher","DOI":"10.1287\/trsc.1080.0256"},{"key":"IJORIS.2018100104-6","doi-asserted-by":"publisher","DOI":"10.4018\/IJBAN.2017010102"},{"key":"IJORIS.2018100104-7","doi-asserted-by":"publisher","DOI":"10.1137\/1.9781611973594.ch5"},{"issue":"4","key":"IJORIS.2018100104-8","first-page":"255","article-title":"An MILP framework for dynamic vehicle routing problems with time windows.","volume":"36","author":"R.Dondo","year":"2006","journal-title":"Latin American Applied Research"},{"key":"IJORIS.2018100104-9","doi-asserted-by":"publisher","DOI":"10.1016\/j.ejor.2004.07.077"},{"key":"IJORIS.2018100104-10","doi-asserted-by":"publisher","DOI":"10.1057\/jors.1988.97"},{"key":"IJORIS.2018100104-11","unstructured":"Fleischmann, B. 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