Hi, Teams and all.

I need to plan the jobs of products in a factory. Each job can be assigned to a particular machine. There are two workshops, A and B, which contain some machines. Now there is a rule: all jobs from the same product can only be assigned to machines that are in the same workshop.
For instance:

• There are 2 workshops, WS-A and WS-B. WS-A has 2 Machines, M-A1 and M-A2, and another Workshop WS-B has 2 Machines M-B1 and M-B2.
• There is a product that contains 2 jobs, Job1 and Job2. Job1 can be assigned to either M-A1 or M-B1, and Job2 can be assigned to either M-A2 or M-B2
• If Job1 is assigned to M-A1, Job2 must be assigned to M-A2 and not to M-B2, as it belongs to workshop WS-B rather than workshop WS-A. If Job2 is assigned to M-B2, Job1 must be assigned to M-B1.

I can easily achieve this requirement by using a hard constraint, but it depends on the optimization. When a dataset is huge and a product has more jobs, it is difficult to ensure that this constraint can be fully satisfied. Is there a more direct way to achieve this requirement without using constraints?

Thanks in advance!