TY - JOUR ID - 101155 TI - Development of a Model for Locating Hubs in a Competitive Environment under Uncertainty: A Robust Optimization Approach JO - International Journal of Engineering JA - IJE LA - en SN - 1025-2495 AU - Nourzadeh, Farzin AU - Ebrahimnejad, Sadoullah AU - Khalili-Damghani, Kaveh AU - Hafezalkotob, Ashkan AD - Department of Industrial Engineering, South Tehran Branch, Islamic Azad University, Tehran, Iran AD - Department of Industrial Engineering, Karaj Branch, Islamic Azad University, Karaj, Iran Y1 - 2020 PY - 2020 VL - 33 IS - 1 SP - 124 EP - 133 KW - Competitive location KW - Multivariate Lagrange Interpolation Function KW - Location Hub KW - robust optimization DO - 10.5829/ije.2020.33.01a.14 N2 - This article explores the development of previous models to determine hubs in a competitive environment. In this paper, by comparing parameters of the ticket price, travel time and the service quality of hub airports, airline hubs are divided into six categories. The degree of importance of travel time and travel cost are determined by a multivariate Lagrange interpolation method, which can play an important role in allocating travelers to follower airline hubs. Then, based on the seasonal demand of travelers, we consider travel demand as uncertain parameters. To determine the robust counterpart of this category of hub location models, a robust optimization method is used. Finally, models are tested in a case study. The central results show that the follower airline's income has a considerable growth and can absorb nearly 2% of travelers of the leader airline due to lower travel costs and travel time compared to that of leader airline. UR - https://www.ije.ir/article_101155.html L1 - https://www.ije.ir/article_101155_f808531f7af19c5c0d53bc51da91b6e3.pdf ER -