Optimization of Fleet Assignment: A Case Study in Turkey

Yavuz OZDEMIR, Huseyin BASLIGIL, Kemal Gokhan NALBANT


The fleet assignment problem which causes great increasing in costs is necessary for a solution of “right fleet to the right flight” for airline companies. In this paper, a fleet assignment model is set up using the data of the biggest Turkish airline company, Turkish Airlines. The aim of this model is to assign most appropriate fleet type to flights while minimizing the cost and determine optimal number of aircraft grounded overnight at each airport. We set up a model with constraints and determination of all airline operations and solve our problem using integer linear programming. Finally, we get an optimum solution which minimizes the total cost while assigning the fleet type to the flight leg. Using optimization software, the solution to this problem generates a minimum daily cost of fleet assignment and it aims to assign most appropriate fleet type to flights while minimizing the cost and determine optimal number of aircraft grounded overnight at each airport.


Airline planning; Fleet assignment; Linear integer programming; Optimization

Full Text:



Etschmaier, M. and Mathaisel, D., Airline Scheduling: An Overview. Transportation Science, 19, 127-138 (1985). CrossRef

Belanger, N., Desaulniers G., Soumis, F., Desrosiers J., and Lavigne J., Weekly airline fleet assignment with homogeneity. Transportation Research Part B, 40, 306–318 (2006). CrossRef

Abara, J., Applying integer linear programming to the fleet assignment problem. Interfaces, 19/4, 20-28 (1989). CrossRef

Belanger, N., Desaulniers, G., Soumis, F., and Desrosiers J., Periodic airline fleet assignment with time windows, spacing constraints, and time dependent revenues. European Journal of Operational Research, 175, 1754–1766 (2006). CrossRef

Kliewer, G. and Tschöke, S., A general parallel simulated annealing library and its application in airline industry. In: Proceedings of the 14th International Parallel and Distributed Processing Symposium (IPDPS 2000), 55-61 (2000). CrossRef

Chung, T. and Chung J., Airline fleet assignment using genetic algorithms. In: Proceedings of the Genetic and Evolutionary Computation Conference (GECCO2002), New York, p.255 (2002).

Subramanian, R., Scheff Jr., R.P., Quillinan, J.D., Wiper, D.S., and Marsten, R.E., Coldstart: Fleet assignment at Delta Airlines. Interfaces, 24 (1), 104-120 (1994). CrossRef

Barnhart, C., Belobaba, P.P., and Odoni, A.R., Applications of operations research in the air transport industry. Transportation Science, 37 (4), 368-391 (2003). CrossRef

Barnhart, C., Kniker T.S., and Lohatepanont, M., Itinerary-based airline fleet assignment. Transportation Science, 36 (2), 199-217 (2002). CrossRef

Talluri, K.T., Swapping applications in a daily airline fleet assignment. Transportation Science, 30 (3), 237-248 (1996). CrossRef

Andersson, E., Efthymios, H., Kohl, N., and Wedelin, D., Crew pairing optimization. In: Yu, G., ed. Operations Research in the Airline Industry. Boston: Kluwer Academic Publishers, 1-31 (1998). CrossRef

Emden-Weinert, T. and Proksch, M., Best practice simulated annealing for the airline crew scheduling problem. Journal of Heuristics, 5 (4), 419-436 (1999). CrossRef

Jarrah, A.I., Goodstein, J., and Narasimhan, R., An efficient airline re-fleeting model for the incremental modification of planned fleet assignments. Transportation Science, 34 (4), 349-363 (2000). CrossRef

Gopalan, R. and Talluri, K.T., Mathematical models in airline schedule planning: A survey. Annals of Operations Research, 76, 155–185 (1998). CrossRef

Kontogiorgis, S. and Acharya. S., US Airways automates its weekend fleet assignment. Interfaces, 29 (3), 52-62 (1999). CrossRef

Grosche, T., Computational intelligence in integrated airline scheduling. Springer, Germany 7-47 (2009). CrossRef

Talluri, K.T., The four-day aircraft maintenance routing problem. Transportation Science, 32 (1), 43–53 (1998). CrossRef

Bard, J.F., Cunningham, I.G., Improving through-flight schedules. IIE Transportation, 19 (3), 242–251 (1987). CrossRef

Cordeau, J.-F., Stojkovic, G., Soumis, F., and Desrosiers, J., Benders decomposition for simultaneous aircraft routing and crew scheduling. Transportation Science, 35 (4), 375–388 (2001). CrossRef

Klabjan, D., Johnson, E.L., Nemhauser, G.L., Gelman, E., and Ramaswamy, S., Airline crew scheduling with time windows and plane-count constraints. Transportation Science, 36 (3), 337–348 (2002). CrossRef

Clarke, L.W., Johnson, E., Nemhauser, G.L., and Zhu, Z., The aircraft rotation problem. Annals of Operations Research, 69, 33–46 (1997). CrossRef

Sherali, H.D., Bish, E.K., and Zhu, X., Airline fleet assignment concepts, models, and algorithms. European Journal of Operational Research, 172, 1-30 (2006). CrossRef

Haouari M., Aissaoui N., and Mansour F.Z., Network flow-based approaches for integrated aircraft fleeting and routing. European Journal of Operational Research, 193, 591–599 (2009). CrossRef

Papadakos N., Integrated Airline Scheduling: Decomposition and Acceleration Techniques. IC-PARC (centre for Planning and Resource Control), 1-38 (2006).

Desaulniers, G., Desrosiers, J., Dumas, Y., Solomon, M., and Soumis, F., Daily aircraft routing and scheduling. Management Science, 43 (6), 841-855 (1997). CrossRef

Barnhart, C., Boland, N., Clarke, L., Johnson, E., Nemhauser, G., and Shenoi, R., Flight string models for aircraft fleeting and routing. Transportation Science, 32 (3), 208-220 (1998). CrossRef

Bazargan, M., Airline Operations and Scheduling. 2nd ed. Ashgate, USA, 40-58 (2004).

Hane, C.A., Barnhart, C., Johnson, E.L., Marsten, R.E., Nemhauser, G.L., and Sigismondi, G., The Fleet Assignment Problem: Solving a Large-scale Integer Program. Mathematical Programming, 70, 211-32 (1995). CrossRef

DOI: http://dx.doi.org/10.11121/ijocta.01.2012.0050


  • There are currently no refbacks.

Copyright (c) 2012 Yavuz OZDEMIR, Huseyin BASLIGIL, Kemal Gokhan NALBANT

Creative Commons License
This work is licensed under a Creative Commons Attribution 4.0 International License.


   ithe_170     crossref_284         ind_131_43_x_117_117  logo_ehost_120    ulakbim_140   proquest_256_x_97_256   zbmath_251_x_86_251 more...