Rules can be defined regarding which work can be done by which resource, according to the characteristics and capabilities of the resources. Here, rules for solving the problem in unlimited scenarios can be defined and associated with the facility plan. To give some examples;

• In the production of AA customer's orders, it may be desired to use resource Z0 as the default resource.
• For 3 mm thick raw material, CNC3 machine can be defined as the default source.
• If the customer is AA, the product is BB and the raw material to be used is CC, it can be modeled that this work should be done at source Z2.