Authors: Qing-Mi Hu
Addresses: School of Economics and Management, Jiangsu University of Science and Technology, Zhenjiang 212003, China
Abstract: This paper addresses the classical single and multiple allocation hub location problems with fully interconnected hubs, in which the balanced round-trip flows on hub links are considered in the strategic decision making process. The use of balanced round-trip flows on hub links is motivated by the need to decrease the empty-trip rate of vehicles and increase the full-load rate of vehicles. Mixed-integer programming models are presented for single and multiple allocation versions of the problems. Numerical experiments with the CAB and AP datasets are performed to analyse the impacts of balanced flows on the network configurations and the utilisation of service resources. Experimental results show that the number of located hubs tends to decrease with a decrease in the allowable unbalanced round-trip degree of the hub link flows. The utilisation rate of transportation resources can be significantly improved with a small increase in the traditional operating cost. Moreover, a better modelling of economies of scale can be achieved when considering balanced flows. [Received: 22 September 2019; Accepted: 15 March 2020]
Keywords: hub location; balanced flows; economies of scale; mixed-integer programming.
European Journal of Industrial Engineering, 2021 Vol.15 No.1, pp.131 - 166
Received: 22 Sep 2019
Accepted: 15 Mar 2020
Published online: 09 Mar 2021 *