Automatic Generation of Document Links 
Use
Document links can be generated automatically from master data when an order is created or released (see Settings for Document Integration ). In the process, the following existing document links are taken into account:
Document links to the material master of the produced material
Document items from the BOM of the produced material that are marked as relevant for production
The document links are also generated automatically in the following cases:
Convert planned order (link from material master/BOM)
Create order with reference (links in the reference order are copied)
Read master data (document items from a new explosion of the BOM)
See also: