Administrative Data 
On the Detail Screen: Administrative Data, you maintain the data concerning the validity period of the item within the BOM.
There are two sections for administrative data: administrative data and validity data.
Administrative Data
The system displays the actual date on which the item was created in the Created on field. If the item has been changed, the system displays the date on which the change was made in the Changed on field.
The administrative data also tells you which user processed the item.
Validity
- Valid from and Valid to date
In the standard R/3 System, you see this data if the item has been changed using a change number with a Valid from date validity.
- The Valid from date is taken from the change master record.
- The Valid to date tells you when the processing version shown is valid to. This date is taken from the change master record of the next validity period.
- Change number and Change number to
- The change number shows which change master record was used to create the processing version.
- If the item has a subsequent validity period controlled by a change number, you see this number in the Change number to field.
- Validity type
You see the validity type if the item has been changed using a change number with a new validity type (for example, validity by serial number).