n_jobs = 4;
n_machines = 2;
capacity = [5, 7];

job_duration = [4, 3, 5, 8];

requirement = [| 2,1,2,2 | 3, 5, 2, 4 |];


precedences = [| 0, 0, 0, 0
	   | 0, 0, 1, 0
	   | 0, -1, 0, 0
	   | 0, 0, 0, 0 |];