The requirement is when buyer place Order for Part Number A, Vendor will sendback Part Number A in a Box.
When the Box is opened it will have 10 Pieces of Part B which is to be received in the system.
I mean Part Number A will have BOMs, When GR is done it has to be done on the Child items & not on Parent item.
How to address this issue in SAP?
Jürgen L replied
you never have a requirement for A in your system, if you manage your stocks at B, hence you have to order B.
That the vendor then sends A and you receive it as B, is just how the vendor manages his goods. This does not mean that you have to have a material A in your system.