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Since airline reservation systems are business critical applications, and they are functionally quite complex, the operation of an in-house airline reservation system is relatively expensive. Prior to deregulation [clarification needed], airlines owned their own reservation systems with travel agents subscribing to them. Today, the GDS are run ...
System context diagrams are used early in a project to get agreement on the scope under investigation. [4] Context diagrams are typically included in a requirements document. These diagrams must be read by all project stakeholders and thus should be written in plain language, so the stakeholders can understand items within the document.
The departure control system (DCS) is the system used by airlines and airports to check-in a passenger. The DCS is connected to the reservation system enabling it to check who has a valid reservation on a flight. The DCS is used to enter information required by customs or border security agencies and to issue the boarding document.
Programmed Airline Reservations System (PARS) is an IBM proprietary large scale airline reservation application, a computer reservations system, executing under the control of IBM Airline Control Program (ACP) (and later its successor, Transaction Processing Facility (TPF)).
A mirror image of the passenger name record (PNR) in the airline reservations system is maintained in the GDS system. If a passenger books an itinerary containing air segments of multiple airlines through a travel agency, the passenger name record in the GDS system would hold information on their entire itinerary, while each airline they fly on would only have a portion of the itinerary that ...
The context diagram serves the purpose of "establish[ing] the information boundary between the system being implemented and the environment in which the system is to operate." [1] Further refinement of the context diagram requires analysis of the system designated by the shaded rectangle through the development of a system functional flow block ...
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Sabre Global Distribution System, owned by Sabre Corporation, [1] is a travel reservation system used by travel agents and companies to search, price, book, and ticket travel services provided by airlines, hotels, car rental companies, rail providers and tour operators.