.  
fleet control level (currently the responsibility of the operators and their operations centers)

After reviewing the data obtained from interviews with airline operations personnel, private aircraft operators, and so forth, we have identified the goals and indicated the associated stakeholders shown in Table A.
Goals  Fleet  Area  Individual Aircraft 
Passengers: get to destination early or on time, be comfortable, minimize cost  X 

Take a desired course (e.g., tour flight) (GA)  X 
Shippers: get cargo to destination early or on time, minimize cost  X 
maintain safety X X X 
maintain overall schedule  X 
have resources available: . aircraft . crew . ground support  X 
avoid turbulence X X 
avoid weather X X X 
save fuel save time compensate for: . late departure . weather change . traffic change . airport status change . wind change . medical emergency . mechanical . bad model or prediction data . pax discomfort (GA) . arbitrary change of plans (GA)  X X X X X X X X X  X X X X X  X X X X X X X X X X X X 
save equipment costs  X 
save crew costs X 
enforce route decision  X X X 
Table A: The goals of route planning and their associated stakeholders

In the next step, each goal is associated with its relevant constraints, functions, and information requirements, shown in Tables B.
Goals  Constraints  Functions  Information 
Passengers: get to destination early or on time, be comfortable, minimize cost  area congestion  anticipate delays  . preflight: predicted . in flight: actual 

schedule  plan departure and arrival times  times: . departure . arrival connections 
turbulent areas  fasten seat belts  turbulent areas time to enter, leave 

Goals  Constraints  Functions  Information 
Take a desired course (e.g., tour flight) (GA)  area congestion  avoid area congestion  area congestion levels, current and anticipated 
turbulent areas and altitudes  avoid turbulence  turbulent areas and altitudes, current and anticipated 
weather  . avoid weather . predict weather  weather (current and anticipated): . departure . en route . arrival 
aircraft performance: . takeoff . landing . altitude . speed . payload . range pilot currency (GA) landing fees (GA) aircraft capabilities (GA) time/attention it takes to replan (GA)  plan route (or change route): . lateral path . altitudes . speeds . payloads . fuel . weight and balance . alternates  . payload . winds . performance requirements . delays . taxi times . weight . fuel costs . lateral path . speeds . altitudes . alternates . RVR . pressures . weather . congestion . traffic delays . fuel range . aeronautical charts (GA) . freezing level charts (GA) 
　
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