Mohammad Mehdi nasiri - School of Industrial Engineering, College of Engineering, University of Tehran
nafiseh shamsi gamchi - School of Industrial Engineering, College of Engineering, University of Tehran
seyed ali torabi - School of Industrial Engineering, College of Engineering, University of Tehran

Hubs are critical elements of transportation networks. Location of hubs and allocation of demands to them are of high importance in the network design. The most important purpose of these models is to minimize the cost, but path reliability is also another important factor which can influence the location of hubs. In this paper, we propose a Pcenter hub location model with full interconnection among hubs, while there are different paths between origins and destinations. The purpose of the model is to determine the reliable path with lower cost. Unlike the prior studies, the number of hubs in the path is not limited to two hubs. This paper presents a bi-objective model which includes cost and reliability to determine the best locations for hubs, the finest allocation of the demands to hubs, and the most efficient path. In order to illustrate the proposed model, a numerical example is presented and solved using the Cuckoo Optimization Algorithm

Hub location, Allocation, Reliable Path, Fully Interconnection, COA