An integrated aircraft routing, crew scheduling and flight retiming model
Computers and Operations Research
Vehicle Routing and Staffing for Sedan Service
Transportation Science
Computers and Operations Research
Airline Fleet Assignment with Enhanced Revenue Modeling
Operations Research
Integrated Airline Fleet and Crew Robust Planning
Transportation Science
Transportation Science
Robust airline schedule design in a dynamic scheduling environment
Computers and Operations Research
An integrated scenario-based approach for robust aircraft routing, crew pairing and re-timing
Computers and Operations Research
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Recognizing that allowing variability in scheduled flight departure times can result in improved flight connection opportunities and a more cost effective fleet assignment, we present a generalized fleet assignment model for simultaneously assigning aircraft types to flights and scheduling flight departures. Our model, a simple variant of basic fleet assignment models, assigns a time window to each flight and then discretizes each window, allowing flight departure times to be optimized. Because problem size can become formidable, much larger than basic fleet assignment models, we develop two algorithmic approaches for solving the model. Our direct solution approach is good for speed and simplicity, whereas our iterative technique minimizes memory usage. Using data from a major U.S. airline, we show that our model can solve real, large-scale problems, and we evaluate the effects of schedule flexibility. In every test scenario, the model produces a fleet assignment with significantly lower costs than the basic model, and, in a separate analysis, the model is used to tighten the schedule, potentially saving aircraft.