! Keywords: Blending / Product Management / Product Mix / Production;
MIN  0.03 P1 + 0.0645 P2 + 0.065 F1 + 0.061 F2 + 0.1 A1 + 0.13 A2
     + 0.119 A3 + 0.08 CB + 0.021 S1 + 0.02 S2 + 0.0195 S3
SUBJECT TO
   ! Raw material availabilities;
  2)  CB <= 20
  3)  S1 <= 200
  4)  S2 <= 200
  5)  S3 <= 200
   ! Quality requirements on;
    ! Carbon content;
  6)  0.04 P1 + 0.15 CB + 0.004 S1 + 0.001 S2 + 0.001 S3 >= 60
  7)  0.04 P1 + 0.15 CB + 0.004 S1 + 0.001 S2 + 0.001 S3 <= 70
    ! Chrome content;
  8)  0.1 P2 + 0.2 A2 + 0.08 A3 >=   6
  9)  0.1 P2 + 0.2 A2 + 0.08 A3 <=   9
    ! Manganese content;
 10)  0.009 P1 + 0.045 P2 + 0.6 A1 + 0.09 A2 + 0.33 A3 +
      0.009 S1 + 0.003 S2 + 0.003 S3 >=   27
 11)  0.009 P1 + 0.045 P2 + 0.6 A1 + 0.09 A2 + 0.33 A3 +
      0.009 S1 + 0.003 S2 + 0.003 S3 <=   33
    ! Silicon content;
 12)  0.0225 P1 + 0.15 P2 + 0.45 F1 + 0.42 F2 + 0.18 A1 + 
      0.3 A2    + 0.25 A3 + 0.3 CB >=   54
 13)  0.0225 P1 + 0.15 P2 + 0.45 F1 + 0.42 F2 + 0.18 A1 + 
      0.3 A2    + 0.25 A3 + 0.3 CB <=   60
    ! Finish good requirements;
 14)  P1 + P2 + F1 + F2 + A1 + A2 + A3 + CB + S1 + S2 + S3 = 2000
END