What if you purchase the item as a unit and want to unbuild it using a BOM? I tried to do this in Odoo 16 and it tells me I can't unbuild them because there is no associated Manufacturing Order. I need to disassemble the purchased items to parts and remanufacture the parts into another product.

Another thing I need to know is how does it handle components that have tracked serial numbers? I need to pull the serial number from the assembled unit and associate it with one of the components it adds to stock. That number will then be used on a newly manufactured item. I don't see how this is accomplished. Any thought would be appreciated.

Unbuild orders are used to undo a completed MO, so it would create the components (and qty) as originally consumed in that specific MO.

Not sure if this addresses your question.