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      • Department of Industrial Engineering
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      Routing and scheduling decisions in the hierarchical hub location problem

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      Author
      Dükkancı, Okan
      Kara, Bahar Y.
      Date
      2014
      Source Title
      Computers & Operations Research
      Print ISSN
      0305-0548
      Publisher
      Elsevier
      Volume
      85
      Pages
      45 - 57
      Language
      English
      Type
      Conference Paper
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      Abstract
      Hubs are facilities that consolidate and disseminate flow in many-to-many distribution systems. The hub location problem considers decisions that include the locations of hubs in a network and also the allocations of the demand (non-hub) nodes to these hubs. We propose a hierarchical multimodal hub network. Based on this network, we define a hub covering problem with a service time bound. The hierarchical network consists of three layers. We consider two different structures: ring-star-star (RSS) and ring-ring-star (RRS). The multimodal network has three different types of vehicles in each layer: airplanes, large trucks and small trucks. For the proposed problems (RSS and RRS), we present and strengthen two mathematical models with some variable fixing rules and valid inequalities. We conduct the computational analysis over the Turkish network and the CAB data sets.
      Keywords
      Cargo applications
      Hierarchical network design
      Hub location
      Time-definite delivery
      Computational analysis
      Hierarchical network
      Hub covering
      Permalink
      http://hdl.handle.net/11693/27641
      Published Version (Please cite this version)
      https://doi.org/10.1016/j.cor.2017.03.013
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      • Department of Industrial Engineering 687
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