Mrp Problem

Hello, i have the following problem:

I want to create a purchase requistion already fixed/firmed. To do this, I have created a material with MRP type P1: MRP, fixing type -1-. The purchase requisition is not created fixed/firmed because is created after the End of planning time fence. The system is creating the Purchase requisition after the planning time fence because, for MRP, the time fence is the horyzon where you do not want to have changes in the planning.

I have one possibility: when I run MD03 with the option display result before saving, I can setup the firming date manually. In this way I can create the purchase requisition already fixed but I have to made it manually.

But my need is to have automatically the purchase requisition already firmed/fixed.

Thanks.

Bye