Each month, airlines crew planning must generate legal crewing solutions. These crewing solutions strive to achieve a minimum-cost of operation by matching specific aircraft, the routes they fly and crew pairings in a manner that each leg is covered by one crew that is capable of flying that aircraft at that time and in that place. The factors that must be respected when assigning a crew member line are called "constraints" which include:
- Government Regulations - FAR 117, FAR 121, FAR 135, CAP 371, CASA, DGAC etc. dependent upon the type of operation and the civil authority overseeing that particular airline.
- Collective Bargaining Agreements (CBA) - ALPA, AFA, IBT
- Airline Policies - FRMP, Fairness
- Flight Time Limitations (FTL) - Daily, Weekly, Monthly, Quarterly and Yearly
- Flight Duty Period Limitations (FDP) - Daily, Weekly, Monthly
- Duty Period Limitations - Daily, Weekly, Monthly
- Rest and Day(s) off Requirements - Daily, Weekly, Monthly
- Acclimatization - mitigation for travel across several time zones
- Diurnal components - Time of day and impingement upon the Window of Circadian Low (WOCL)
- Augmentation ( operations with additional active crew members )
- Credit/Pay Limitations
- Pre-assigned absences and duties.
- Scheduling Continuity - time between flights, Overlapping activities, Separation of assignments, base allocation of crew members, Reserve limitations, Crew Training Requirements.
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Other articles related to "constraints, constraint":
... formal definition of database schema is a set of formulas (sentences) called integrity constraints imposed on a database ... These integrity constraints ensure compatibility between parts of the schema ... All constraints are expressible in the same language ...
... of variables and an infinite number of constraints, or an infinite number of variables and a finite number of constraints ... In the former case the constraints are typically parameterized ...
... large, possibly infinite number of linear inequality constraints ... Instead the problem is solved by using delayed constraint generation where only a finite and small subset of the constraints is used ... Optimizing over a subset of the constraints enlarges the feasible set and will yield a solution which provides a lower bound on the objective ...
... In this article, the following constraints apply The term "cursor" includes all cursor-like behavior ...
... algebraic manipulations, we get subject to the constraints , for some constant Minimizing subject to the constraints above is NP-hard ... To make the problem tractable, we relax the constraints on, and allow it to take real values ...
Famous quotes containing the word constraints:
“The analogy between the mind and a computer fails for many reasons. The brain is constructed by principles that assure diversity and degeneracy. Unlike a computer, it has no replicative memory. It is historical and value driven. It forms categories by internal criteria and by constraints acting at many scales, not by means of a syntactically constructed program. The world with which the brain interacts is not unequivocally made up of classical categories.”
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