BOM not adjusting

I have items that have a BOM but it is not adjusting the inventory of the items in the BOM. Any Reason why this would be?

  1. Which BOM - Assembly or Production?
  2. After what action you expected individual Items to be “adjusted” but they do NOT?

The assembly BOM, and honestly it doesnt matter a whole lot which one, it could be after invoicing that it does it, if we could get the BOMs to update before then that would be fine also.