There are special functions for BOMs. If you change a BOM with reference to a change number, the system creates a new header record and/or a new item record.

If you change the BOM with reference to a change number, you will not always necessarily create a new header record or item record.

The following header data is not changed with history even when changed with reference to a change number:

• BOM text
• External BOM number
• Entries for the lot-size range

If you change the sub-items of an item, then you will create only one item record if a new item quantity is calculated due to the quantity change of the sub-items.

The item record is not duplicated if you withdraw the change in the current transaction.

If you change the following item data, then a new item record will be created even if you withdraw the change later.

• Sub-item
• Object dependencies
• Long text