Header Detail Screen: Administrative Data 
On this screen, the system displays the data that identifies the BOM. You also see the following validity data:
- Date BOM was created
- Name of user who created the BOM.
- Date BOM was last changed
- Name of user who last changed the BOM
You also see which change master record governs the next validity period of the BOM.
If you have created or changed BOM header data using a change number, the change master record you used is identified in the Change number field. If this change status has also been changed using a change number, you see the change number whose change master record controls and documents the next change in the Change number to field.