Crew scheduling can be defined as the problem of assigning a group of workers (a crew) to a set of tasks. The crews are typically interchangeable , although in some cases different crews possess different characteristics that affect which subsets of tasks they can complete. Crew scheduling problems appear in a number of transportation contexts. Examples include bus and rail transit, truck and r...

This article explores the development of previous models to determine hubs in a competitive environment. In this paper, by comparing parameters of the ticket price, travel time and the service quality of hub airports, airline hubs are divided into six categories. The degree of importance of travel time and travel cost are determined by a multivariate Lagrange interpolation method, which can pla...

Scheduling landings of aircrafts is an essential problem which is continuously solved as part of the daily operations of an airport control tower. All planes in the airspace of an airport are to be assigned to landing slots by the responsible air-tra c controller. The support of this decision problem with suited optimization approaches has a long lasting tradition in operations research. Howeve...

This paper explores the use of scenario planning and the design of a knowledge-based system in strategic decision making, in the context of the European airline industry. Several innovative strategies were derived, as well as other key recommendations based on sound strategic reasoning, and participants testified to the effectiveness of the approach in stretching their thinking. The requirement...

The crew planning problem has been successfully solved on a loosely connected network of workstations (NOW) using advanced computational techniques and efficient communication patterns. The parallelization of the successful sequential system of Carmen Systems AB guarantees that the results are immediately useful and applicable to a large number of airlines scheduling problems. The parallel pair...

As detailed below, we respect the work of Dr. Makarieva and co-authors (Makarieva et al., 2008), but we have come to similar conclusions as Dr. Haynes and decided not to accept the manuscript for final publication in ACP. The decision is supported by the entire ACP executive committee, but for clarity and simplicity the following editorial report is formulated from my perspective as the chief-e...

Crew scheduling is an important production planning of airlines. Being optimized crew scheduling could make full use of human resources, and reduce operating costs. The traditional airline crew scheduling model is deterministic and does not include potential disruptions due to weather, air traffic control, etc. To take into account of effects of random factors such as weather, air traffic contr...

The airline industry has been a pioneer in using operations research techniques to solve complex business problems related to the schedule planning of the airline. Given a flight schedule, an airline’s schedule planning group needs to decide the itinerary of each aircraft and each crewmember so that the total revenue minus the total operating costs is maximum and all the operational constraints...

In order to build a practical dialog system, it is essential to define the application domain of the system so that optimal recognition performance can be obtained by using proper acoustic, language and semantic models. The DARPA Communicator Systems, for instance, are constructed to play the role of a travel agent speaking by phone with a customer in a specific domain of Airline Travel Plannin...