Now showing items 1-5 of 5

    • Aircraft rescheduling with cruise speed control 

      Aktürk, M. S.; Atamtürk, A.; Gürel, S. (Institute for Operations Research and the Management Sciences (I N F O R M S), 2014-05-23)
      Airline operations are subject to frequent disruptions typically due to unexpected aircraft maintenance requirements and undesirable weather conditions. Recovery from a disruption often involves propagating delays in ...
    • Assortment planning under non-linear cost structures 

      Shams, Farzad (Bilkent University, 2019-04)
      We first consider the assortment optimization problem with fixed product costs under the Mixtures of Multinomials (MMNL) Model. The problem is NP-hard even under the Multinomial Logit Model and the existing literature ...
    • A Conic Integer Programming Approach to Constrained Assortment Optimization under the Mixed Multinomial Logit Model 

      Şen, A.; Atamtürk, A.; Kaminsky, P. (Institute for Operations Research and the Management Sciences (INFORMS), 2017-08-12)
      We consider the constrained assortment optimization problem under the mixed multinomial logit model. Even moderately sized instances of this problem are challenging to solve directly using standard mixed-integer linear ...
    • Multi-location assortment optimization under capacity constraints 

      Bebitoğlu, Başak (Bilkent University, 2016-08)
      We study the assortment optimization problem in an online setting where a retailer determines the set of products to carry in each of its distribution centers under a capacity constraint so as to maximize its expected ...
    • Multi-stage airline scheduling problem with stochastic passenger demand and non-cruise times 

      Şafak, Ö.; Çavuş, Ö.; Aktürk, M. S. (Elsevier, 2018)
      We propose a three-stage stochastic programming model which determines flight timing, fleeting and routing decisions while considering the randomness of demand and non-cruise times. Our model differs from the existing ...