steelT.sa7

Warning

The original AMPL book does not reflect many of the latest features available in AMPL. To programmatically interact with your models you should use APIs such as our popular Python API.

steelT.sa7

model steelT.mod;
data steelT.dat;

option solution_precision 10;
option solver_msg 0;

set AVAIL3 default {};
param avail3_obj {AVAIL3};
param avail3_dual {AVAIL3};

let avail[3] := 0;
param previous_dual default Infinity;

repeat {
   let avail[3] := avail[3] + 1;
   solve;
   if Time[3].dual = previous_dual then continue;

   let AVAIL3 := AVAIL3 union {avail[3]};
   let avail3_obj[avail[3]] := Total_Profit;
   let avail3_dual[avail[3]] := Time[3].dual;

   if Time[3].dual = 0 then break;

   let previous_dual := Time[3].dual;
}

display avail3_obj, avail3_dual;