! Keywords: Airlines / Covering / Scheduling / Staff Scheduling;
MIN   3 T1 + 3 T2 + 3 T3 + 3 T4 + 3 T5 + 3 T6 + 3 T7 + 3 T8 + 3 T9 
    + 3 T10 + 3 T11 + 2 T12 + 3 T13 + 3 T14 + 2 T15 + 3 T16 + 3 T17 
    + 3 T18 + 3 T19 + 2 T20 + 3 T21 + 3 T22 + 3 T23 + 2 T24 + 2 T25 
    + 3 T26 + 2 T27 + 2 T28 + 3 T29 + 3 T30 + 3 T31 + 3 T32 + 3 T33 
    + 3 T34 + 3 T35 + 3 T36 + 3 T37
SUBJECT TO
F101)   T1 +  T11 +  T16 +  T25 +  T26 +  T29 +  T34 =    1
F410)   T2 +  T12 +  T13 +  T19 +  T27 +  T28 +  T30 +  T33
     +  T35 =    1
F220)   T3 +  T14 +  T15 +  T29 +  T30 =    1
 F17)   T4 +  T16 +  T20 +  T22 +  T25 +  T27 +  T29 +  T31
     +  T34 +  T36 =     1
  F7)   T5 +  T17 +  T18 +  T31 +  T32 =    1
 F13)   T6 +  T12 +  T17 +  T33 =    1
 F11)   T7 +  T15 +  T19 +  T21 +  T23 +  T26 +  T28 +  T30
     +  T32 +  T33 +  T35 +  T37 =    1
 F19)   T8 +  T13 +  T18 +  T20 +  T21 +  T27 +  T28 +  T31
     +  T32 +  T34 =    1
 F23)   T9 +  T11 +  T22 +  T23 +  T24 +  T25 +  T26 +  T35
     +  T36 +  T37 =    1
  F3)   T10 +  T24 +  T36 +  T37 =    1
END