BOM+ subcontracting

hi,

The BOM consists of 5 materials,but in that i need to maintain 3 materials in unrestrietd stock, 2 materials in blocked stock.while doing GR, 3materials be in unresticted stock& 2 materials send in blocked stock. 3materials is sufficient to prepare the final product,for it, is there any settings to be done in PO/GR?

regards,

P.C.Obulesu