The BOM module also provides a means to release (that is, locking) selected BOM nodes. This functionality is available through the B.20.01.35 Verification and Status screen. Release of BOM data is driven by list status, which is a non-key attribute on the BOM positions table that indicates the data quality with regard to user-definable data requirements. After a node is locked, no changes to its detail data are allowed unless a new revision is created. Creating a new revision saves the data of the old (locked) revision into a history table to allow tracking of changes throughout several revisions, and creating a new revision also resets the list status on the position level back to the default initial list status.
For BOM data import through OMI, you can specify how the import program should handle locked nodes for which modification data is in the import file. You can allow OMI to create a new revision automatically in such a case, or you can specify that such data should remain unchanged and the BOM lock respected.