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 time, fuel  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, takeoff, landing requirements  . obstacles data base . obstacles conflict detection 
traffic  . avoid traffic . maintain separations  traffic: . types . locations . intentions 
check company route options  company routes 
ATC procedures  check procedures  procedures 

Goals  Constraints  Functions  Information 
Shippers: get cargo to destination early or on time, minimize cost  schedule  plan arrival times  schedule 

Goals  Constraints  Functions  Information 
maintain safety  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) aircraft capabilities (GA) time/attention it takes to replan (GA)  plan route (or change route): . lateral path . altitudes . speeds . fuel . weight and balance . alternates  . payload . winds . performance requirements . delays . taxi times . tail number history . flight history . weight . lateral path . speeds . altitudes . alternates . RVR . pressures . maintenance schedule . aircraft data . weather . congestion . traffic delays . fuel range . aeronautical charts (GA) . freezing level charts (GA) 

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 CDL items maintenance requirements 
crew: . time limits . qualifications  assign crews to flights  crew: . time limits . qualifications 
　
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