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'''Crew scheduling''' is the process of assigning crews to operate transportation systems, such as rail lines or aircraft.
Most transportation systems use software to manage the crew scheduling process. Crew scheduling becomes more and more complex as you add variables to the problem. These variables can be as simple as 1 ___location, 1 skill requirement, 1 shift of work and 1 set roster of people. In the Transportation industries, such as Rail or mainly Air Travel, these variables become very complex. In Air Travel for instance, there are numerous rules or "constraints" that are introduced. These mainly deal with legalities relating to work shifts and time, and a crew members qualifications for working on a particular aircraft. Add numerous locations to the equation and Collective Bargaining and Federal labor laws and these become new considerations for the problem solving method. Fuel is also a major consideration as aircrafts and other vehicles require a lot of costly fuel to operate. Finding the most efficient route and staffing it with properly qualified personnel is a critical financial consideration. The same applies to rail travel.
The problem is computationally difficult and there are competing mathematical methods of solving the problem. Althoug not easy to describe in one
'''Within a set of constraints and rules, move a set roster of people with certain qualifications, from place to place with the least amount of personnel and aircraft or vehicles in the least amount of time.''' <br>
Lowest cost has traditionally been the major driver for any crew scheduling solution.
Although not a "rule", We can describe at least 4 parts of the equation that are ingested by the computational process:
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<li> pairing experienced crew members with more junior crew members
<li> returning crew to their base at the end of their trip (called [[Deadheading (aviation)|deadheading]])
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All of these issues need to be addressed in order to create a satisfactory solution for personnel and management of the organization. For the Crew member in a seniority based system schedules
This does not allow the personnel to have any choice or voice in the schedules they receive. This lack of scheduling awareness until the end of each scheduling period is a major workforce issue and an employee [http://www.time.com/time/business/article/0,8599,1997688,00.html morale problem], often creating a tenuous situation especially where a collective bargaining agreement is in place, and particularly at negotiation time. To address this issue, and to satisfy the growing voice of personnel to have a say in their scheules, in the
This was a new method of allowing personnel to create input data that factored in the calculations of the schedules, while still allowing management a level of control over critical business decisions. This has become a standard in the industry. The newest approach to PBS and crew scheduling takes advantage of the interaction possible via the web, which wasn't possible in the
Crewmembers and management can interact with schedules and data in a real-time web interface. Status can be seen and acted upon as it develops and changes, rather
<ref>http://www.carmensystems.com/research_development/articles/crtr0303.pdf "Solving the World's Largest
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Additional unplanned disruptions in schedules due to weather and [[air traffic control]] delays can disrupt schedules, so crew scheduling software remains an area for ongoing research.<ref>
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