Production in Alternative Pant

Hi,

We have 2 Plants(1000 & 1100) and some materials are produced in both the Plants.

I have a Sale order for X material Qty 10,000 kg, I want to produce the material 5000 kg in each Plant.When I run the MRP for sale order, It is picking the Plant from Sale order and giving planned order for 10000 kg in Plant 1000.

No capacity planning is activated, How to map it in SAP.

Regards,

Sangisetti.