In this example, we illustrate a simple product mix model for deciding how much of two types of computers to produce. Note LINGO allows you to use scalar variables and forgo the use of sets, thus allowing straightforward entry of simpler models.

MODEL:

 !  Total profit for the week;

     MAX = 200 * WS + 300 * NC;

 

 !  The total number of Wordsmiths produced is

    limited by the supply of graphics chips;

      WS <= 60;

 

 !  The total number of Numbercrunchers produced is

     limited by the supply of math coprocessors;

      NC <= 40;

 

 !  The total amount of memory used in all machines

     manufactured for the week can't exceed 120 Mb;

      WS + 2 * NC <= 120;

END

Model: PC