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has been cited by the following article:

• TITLE: A Heuristic Algorithm for Vehicle Routing Problems with Simultaneous Pick-Up and Delivery and Hard Time Windows

  AUTHORS: Suna Cetin, Cevriye Gencer

  KEYWORDS: Vehicle Routing Problems, Pick-Up and Delivery Service, Time Windows

  JOURNAL NAME: Open Journal of Social Sciences, Vol.3 No.3, March 18, 2015

  ABSTRACT: In this study, Vehicle Routing Problems with Simultaneous Pick-Up and Delivery and Hard Time Windows (VRPSPDHTW), the special case of vehicle routing problems is discussed. The goal of vehicle routing problems is generally, the minimization of travelled distance or travelling cost. In the literature, it is seen that same objective functions are defined in time windows vehicle routing problems. However, in time window vehicle routing problems, waits resulting from time window should be taken into account. In the study, objective function was specified as minimization of waits in VRPSPDHTW and the mathematical model has been defined as a set. In addition, heuristic algorithms are proposed for the solution of the problem.Solomon data set were modified to fit the structure of the problem and proposed algorithm was tested.