Adding a little to JohnB,
Maybe add in an event, popup message, or some means of alerting or flagging  a unit that gets below a set minimum level.  Have the event set up in such a way that when those items are tagged, it opens up (or you can click on a button) it's own table/form for a printout on just these flagged items. Something you can hand to the purchasing agent to show items that are below minimum level and need to be ordered.  Currently I can set an overall minimum level for all products but not for each item individually. I have a lot of products and don't know if it can be done.  If so, that would greatly enhance an inventory.