Hi.
I suggest to describe better your scenario. Do you mean the forecast issue? How many requirements do you have by sku in you system now? the requirements are related by customer order or production order or planned order?
In SAP you can run the forecast but the result is by plant or mrp area, not by storage location. You can decide the period (weeky or monthly..) and the results is depending on the consuption in the past.
If you have already many requirements on you system, may by you've just to make a query con RESB table grouping by week the requirements.
Regards.