I'm not sure I understand what you mean you are using "codification" to push/pull items from the racks. Is this something you could use an item list for? You could create a label on the items, and field in the list properties that would allow you to "pull" items from the list based on a query.
If you could set up the list pull as a "Pull from List" activity in process flow, this would allow you to generate tokens based on the distribution rate at which you want the pulls to occur, and then they could pull from the global item list you created. Is this along the lines of what you're looking for?
