Havacılık ve Uzay Teknolojileri Dergisi (Jan 2009)
HAVAYOLU KARGO TAŞIMACILIĞINDA KAPASİTE SINIRI OLMAYAN ÇOK ATAMALI p-ANA DAĞITIM ÜSSÜ MEDYAN PROBLEMİNE TAMSAYILI MODEL YAKLAŞIMI
Abstract
In the hub and spoke network structure, a facility which has the central location serves as a hub. Flows outgoing from other facilities are collected and grouped in the hub. All of the flows depart from this hub either to other hubs or directly to their destinations. This centralization and expansion of operational network provide the benefits of economies of scale. Hub and spoke networks increase the profits and decrease the costs of airlines. In this study, it is aimed to develop a new aspect about hub location problems. The effects of aircraft types and characteristics of the sector over the hub locations have been investigated. Starting from the characteristics of the air transportation and the aircraft performance mixed integer linear model related with the uncapacitated multiple allocation p-hub median problem has been developed. Model was coded in GAMS software. CPLEX solver was used. It was found that the constraints and parameters have an important effect on the hub location and allocation.