PPDS Planning based on Production Line

Hi,

We are producing a finished product F1 on two production lines L1 and L2. This creates 2 dependant demands on semi finished S1.

Running MRP heuristic accumulates demands on S1 and creates a single combined order. We would like to have two orders for S1 planned on the same production lines matching the demand.

Any ideas on how this can be achieved? custom heuristic may be??

Thanks,

Zeeshan.