Dear Ahmed.
I agreed on answered as given by Mr. Rupesh and Mr. Caetano.
System give you procurement proposal by Sale order and Sale order item wise in individual segment (MTO) planning and will generate plan order against each sale order line item.
And second option is to grouped your procurement proposal through "2-Collective requirement" Indicator in the material master MRP-4 (MARC-SBDKZ). System will create single plan order if date is same against sale orders. You have also options to further groups your procurement proposal in weekly and monthly by selecting desire lot size procedures.
If you still want to proceed procurement proposal as per your need, then you have to check relevant BADI as per below link.
Check if below will meet your requirement.
You not plan your dependent requirement of grey fabric by activating indicator '1' in the materiel master MRP-4 and created sale order wise customer requirement through MD81.
Regards/ Nasir Ramzan