The Line Nbr. field on BOM Material Details is fixed, and doesn't reset or renumber the details when lines are deleted. As an example, a BOM with 5 material details is numbered 1, 2, 3, 4, 5. If line 4 is removed, the Line Nbr. fields subsequently read 1, 2, 3, and 5. It would make more sense if the field, at least on screen, displayed as 1, 2, 3 and 4. This is especially important on BOMs with a lot of details; users maintaining BOMs may want to confirm the total number of details against the line number to make sure they haven't missed anything when adding/ updating.