Airline mitigation of propagated delays via schedule buffers: Theory and empirics

•Schedule buffers help airlines deal with flight delays.•Flight and ground buffers are the times added to minimum feasible flight and ground times to get scheduled air and ground times.•We develop a theoretical model to analyze the airline’s choice of buffer lengths.•Regression analysis then tests s...

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Veröffentlicht in:Transportation research. Part E, Logistics and transportation review Logistics and transportation review, 2021-06, Vol.150, p.102333, Article 102333
Hauptverfasser: Brueckner, Jan K., Czerny, Achim I., Gaggero, Alberto A.
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Sprache:eng
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Zusammenfassung:•Schedule buffers help airlines deal with flight delays.•Flight and ground buffers are the times added to minimum feasible flight and ground times to get scheduled air and ground times.•We develop a theoretical model to analyze the airline’s choice of buffer lengths.•Regression analysis then tests some of the model’s predictions. This paper presents an extensive theoretical and empirical analysis of the choice of schedule buffers by airlines. With airline delays a continuing problem around the world, such an undertaking is valuable, and its lessons extend to other passenger transportation sectors. One useful lesson from the theoretical analysis of a two-flight model is that the mitigation of delay propagation is done entirely by the ground buffer and the second flight’s buffer. The first flight’s buffer plays no role because the ground buffer is a perfect, while nondistorting, substitute. In addition, the apportionment of mitigation responsibility between the ground buffer and the second flight's buffer is shown to depend on the relationship between the costs of ground- and flight-buffer time. The empirical results show the connection between buffer magnitudes and a host of explanatory variables, including the variability of flight times, which simulations of the model identify as an important determining factor.
ISSN:1366-5545
1878-5794
DOI:10.1016/j.tre.2021.102333