RVR  determine landing requirements  RVR 
aircraft qualifications: . CAT . ETOPS . RNP . etc. maintenance weight limits aircraft range performance limitations utilization costs aircraft ownership  assign aircraft to flights  aircraft qualifications: . CAT . ETOPS . RNP . etc. aircraft performance MEL items maintenance requirements 
crew: . time limits . qualifications  assign crews to flights  crew: . time limits . qualifications 
restricted areas  avoid restricted areas  restricted areas and schedules 
aircraft status: . MELs . CDLs . maintenance schedule  assess aircraft assignments  aircraft limitations: . MELs . CDLs . maintenance schedule 
airports: . size . navaids . qualifications . ground support . curfew . noise . construction . company presence . maintenance facilities . arrival rates . arrival procedures . altitude . runway conditions . RVR  assess diversion sites  airports: . size . navaids . qualifications . ground support . curfew . noise . construction . company presence . maintenance facilities . arrival rates . arrival procedures . altitude . runway conditions . RVR . performance requirements . taxi times . weather . FBO agreements . fuel prices . in/out speed 
winds  optimize for fuel and time  winds 
pressure  assess pressure impact on aircraft  pressure maps 

temperature  determine temperature performance impacts  temperatures 
overflight fees  compare route costs  fees map 
terrain  avoid terrain  . drift down procedures . departure procedures . terrain conflict detection 
obstacles  assess drift down requirements  . obstacles data base . obstacles conflict detection 
traffic  . avoid traffic . maintain separations  traffic: . types . locations . intentions 
assess company route options  company routes 
assess jetway options  jetways 
ATC procedures  assess procedures  procedures 
current aircraft status  gather status information  flight status: . position . lateral path . altitude . speed . payload . fuel on board . mechanical . performance . passengers . crew . connections . arrival times . priority 
enforce route decision  route information and rationale 

Goals  Constraints  Functions  Information 
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)  area congestion  plan arrival sequences . within fleet . between fleets  times: . departure . arrival connections: . passengers . cargo . crew . aircraft 
turbulent areas and altitudes  avoid turbulence  turbulent areas and altitudes, current and anticipated 
　
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