hello nikos
iff i am not mistaking its something like this
the ranking is calculated per hour using current flighthours,current active/retired pilots,tha ammount off schedulles(having 500 schedulles for 3 pilots will be badder than 100 for 3)also you have to make some flights a day to stay at 0 this also depends onn all the factors i just mentiont
thats i think about it but possible i forgot some things.
gr joeri