In PSB and MAPSB it would help a lot with a new function: "BOM - same part multiple times on same position checker".
This will help operations ( manufacturing ) to very quick give feedback to technology ( designers ) if a product BOM have same part multiple times on the very same position.
This has been quite common for complex product BOM' s that are calculated and not designed.
Easy logic to traverse thru the BOM from top to bottom and temporary save absolute position for each part. When the whole BOM has been traversed, check if there are identical absolute position for any part.