Decision makers in air transportation face many uncertainties. In spite of this, airline planning models do not explicitly consider uncertainty in operations. As a result, there is often a notable discrepancy between an airline’s planned and actual performance. We present a stochastic model of the daily operations of a domestic airline. Its primary purpose is to evaluate plans, such as crew sch...

Fleet planning is a process of strategic importance for an airline. Airlines have a tendency to match their capacities and passenger demand for corresponding market conditions, which has a direct impact on airline profitability and costs. It is necessary to consider many different factors in order to make a good fleet plan. This paper proposes the sequential two-stage model for fleet planning. ...

A sequential optimisation algorithm is developed to improve the operational reliability of airline schedules. Simulation results show that departure delays are reduced by 30% after optimisation by using extra 260 min buffer times in the schedule. This also increases the network-wide schedule reliability from 37 to 52% and an estimated delay cost saving of $20 million dollars per annum for a sma...

In scheduled air transportation, airline profitability is influenced by the airline's ability to construct flight schedules. To produce operational schedules, airlines engage in a complex decision-making process, referred to as airline schedule planning. Because it is impossible to simultaneously solve the entire airline schedule planning problem, the decisions required have historically been s...

Airline delay costs are incurred both on the day of operations (tactical cost) and at the planning stage (strategic cost). The latter may take the form of buffer in schedules. Strategic and tactical costs are not independent. Passenger costs of delay to the airline, crew, fuel, maintenance and fleet costs are quantified. Cost trade-offs are presented as a 3D plot assessing the ‘break-even’ poin...

We have collected, transcribed and analyzed over 8 hours of human-human interactive problem solving dialogue in the air travel planning domain, including traveler-agent dialogues and the more constrained agent-airline dialogues. We have used this data to define and test an initial vocabulary, and to design an appropriate interface for the air travel planning domain. The initial interface design...

Airlines operating in Turkey strive to be international leaders their segments by adopting different competitive strategies. The crew planning department plays an active role achieving the goals of airline. In this study, departments airline companies that adopt two strategies are compared and differences they encounter practice revealed.

Aircraft maintenance planning and scheduling constitute planning, control and execution of materials (spare parts), operations (inspection, disassembly and assembly activities) and resources (labour, machines, transport equipment, etc.). This is a complex problem due to large number of components involved at various planning and execution levels, and the size/nature of resource-intensive mainte...

C a profitable schedule is of utmost importance to an airline because its profitability is critically influenced by its flight offerings. We focus our attention on the steps of the airline schedule planning process involving schedule design and fleet assignment. Airline schedule design involves determining when and where to offer flights such that profits are maximized, and fleet assignment inv...

Since the 1950s, the operations research community has developed a large number of computer models to aid in the solution of airline scheduling problems. One notable characteristic of these contributions is that each algorithm was developed with its own input and output structures, user interface, and hardware and software requirements. The result is that many of these contributions are under-u...