Hi Rahul,
For eg. say for a product P1 the network is as follows:
Customer (C1) ->DC(D1)-> Plant (PL1)
Now i am running a location heuristic for product P1 and location C1, D1 and PL1.
System should know at which location ,heuristic should run first to generate dependent demand on the relevant source location. So once low level code is assigned to all product location Heuristic will run according to low level code.
Regards,
Mukesh Pandey