Production version-Alternate BOM selection-Quota arrangement
In addition to Blog by Mr Rajen https://scn.sap.com/community/erp/manufacturing-pp/blog/2013/08/15/alternative-bom-selection-a-workaround,
The Alternate BOM selection method based on the MRP 4 which determines the selection of alternative BOM in MRP run.

- With Selection by order quantity, the system chooses the alternative BOM into whose lot size range the order quantity falls. The lot size range and area of validity of the BOM apply.
- With Selection by explosion date, the system chooses the alternative BOM into whose area of validity the date falls according to the setting BOM via dates.
- With Selection by Production version, the system chooses the alternative BOM defined in the valid production version. The lot size range and area of validity of the production version apply.
- With Selection only by production version, the system chooses the alternative BOM defined in the valid production version. The lot size range and area of validity of the production version apply. If no production version is found, no production orders or process orders can be created.


New NetWeaver Information at SAP.com
Very Helpfull