You receive this log automatically. It informs you of the changes that have been made.
BOM for <material> <plant> changed
The log also contains the name of a background session that you can use to process the BOMs that have not been changed. This session contains a sequence of transactions for changing BOMs, for example, Change Material BOM or Change Material BOM Group.
You go to the screen Batch-Input: Session Overview, where you can select the sessions you want to process.