Originally posted by: Ninetyfive

Hi all! I am beginner in IBM ILOG CPLEX and definitely need some help. I have a multiobjective task of choosing a location for a new plant of a company. There are two criteria: distances between alternative locations and cities-customers and a quality of roads between them. I had successfully solved this task for one criterion, when only distances were considered.

Qualities of roads are numbers from 1 to 10 and they are placed in a two-demensional array. User of this program should establish a minimal quality of the roads he is ready to accept. So, I have a an objective function which depends on distances and I need some constraint that would throw out decisions with a bad quality of roads. Eventually, the program must show a best value of an objective function depending on value of minimal quality road user establishes.

So, how can I make this constraint work? Iteration should start with minimal quality = 10, find a best solution for it (or show that it doesn't appear), then reduce minimal quality down to 9, find a best solution and so on. Teacher said the program should use not only standard methods, but also a main { } block :))

Hope you'll be able to help me. Great thanks in advance!