Preferential Bidding System - Constraints


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

These include:

  • 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.

Read more about this topic:  Preferential Bidding System

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