A hub covering network design problem for cargo applications in Turkey

Alumur, Sibel A.; Kara, Bahar Y.

doi:10.1057/jors.2008.92

Cited by 52 publications

(27 citation statements)

References 32 publications

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“…Also, there are economies of scale due to bulk transportation between operation centers. Therefore, the cargo delivery problem can be considered as a hub location problem ( Alumur and Kara, 2009;Kara and Tansel, 2001;Tan and Kara, 2007;Yaman et al, 2007;2012 andAlumur et al, 2012b ). In Kara and Tansel (2001) , the authors emphasize the importance of synchronization in cargo delivery systems.…”

Section: E-mail Address: Bkara@bilkentedutr (By Kara)mentioning

confidence: 99%

Routing and scheduling decisions in the hierarchical hub location problem

Dükkancı

Kara

2017

Computers & Operations Research

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a b s t r a c tHubs 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 the allocations of demand (non-hub) nodes to these hubs. We propose a hierarchical multimodal hub network structure, and based on this network, we define a hub covering problem with a service time bound. The hierarchical network consists of three layers in which we consider a ring-star-star (RSS) network. This multimodal network may have different types of vehicles in each layer. For the proposed problem, we present and strengthen a mathematical model with some variable fixing rules and valid inequalities. Also, we develop a heuristic solution algorithm based on the subgradient approach to solve the problem in more reasonable times. We conduct the computational analysis over the Turkish network and the CAB data sets.

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Section: E-mail Address: Bkara@bilkentedutr (By Kara)mentioning

confidence: 99%

Routing and scheduling decisions in the hierarchical hub location problem

Dükkancı

Kara

2017

Computers & Operations Research

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“…So, all of these demand centers are mutually origins and destinations to each other in the set S b 1 . All of the remaining pairs from 81 demand centers are included in the set S b 2 .…”

Section: Fl G Ijmentioning

confidence: 99%

“…Calik et al [8] considered the hub covering version of this network design problem. Alumur and Kara [2] worked on a special case where the hub network has a diameter of three. Another special case where the hub network is an undirected tree is introduced as the tree of hubs location problem to the literature by Contreras et al [17,18].…”

Section: Introductionmentioning

confidence: 99%

Multimodal hub location and hub network design

Alumur

Kara

Karaşan

2012

Omega

172

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a b s t r a c tThrough observations from real life hub networks, we introduce the multimodal hub location and hub network design problem. We approach the hub location problem from a network design perspective. In addition to the location and allocation decisions, we also study the decision on how the hub networks with different possible transportation modes must be designed. In this multimodal hub location and hub network design problem, we jointly consider transportation costs and travel times, which are studied separately in most hub location problems presented in the literature. We allow different transportation modes between hubs and different types of service time promises between origindestination pairs while designing the hub network in the multimodal problem. We first propose a linear mixed integer programming model for this problem and then derive variants of the problem that might arise in certain applications. The models are enhanced via a set of effective valid inequalities and an efficient heuristic is developed. Computational analyses are presented on the various instances from the Turkish network and CAB data set.

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“…Recent overviews on hub network design in express networks are given by Alumur and Kara (2009). Overviews on hub network design in general are given by ReVelle et al (2008) and Melo et al (2009).…”

Section: Related Literaturementioning

confidence: 99%

Enriching the tactical network design of express service carriers with fleet scheduling characteristics

et al. 2010

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Express service carriers provide time-guaranteed deliveries of parcels via a network consisting of nodes and hubs. In this, nodes take care of the collection and delivery of parcels, and hubs have the function to consolidate parcels in between the nodes. The tactical network design problem assigns nodes to hubs, determines arcs between hubs, and routes parcels through the network. Afterwards, fleet scheduling creates a schedule for vehicles operated in the network. The strong relation between flow routing and fleet scheduling makes it difficult to optimise the Flex Serv Manuf J (2010) 22:3-35 DOI 10.1007 network cost. Due to this complexity, fleet scheduling and network design are usually decoupled. We propose a new tactical network design model that is able to include fleet scheduling characteristics (like vehicle capacities, vehicle balancing, and drivers' legislations) in the network design. The model is tested on benchmark data based on instances from an express provider, resulting in significant cost reductions. 123

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A hub covering network design problem for cargo applications in Turkey

Cited by 52 publications

References 32 publications

Routing and scheduling decisions in the hierarchical hub location problem

Routing and scheduling decisions in the hierarchical hub location problem

Multimodal hub location and hub network design

Enriching the tactical network design of express service carriers with fleet scheduling characteristics

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