We came across a situation using Dynamics NAV 2013 Assembly Orders that, at first, we didn’t know how to handle.
You have set up a Dynamics NAV Item with the Replenishment System set to “Assembly Order” and the Assembly Policy set to “Assemble to Order”. For some reason, you have some of that item already in stock (perhaps the in-stock quantity came from a sales return). A new sales order comes in for the same item, and you want to use up the stock quantity of the item before assembling new ones. If you don’t do anything, the system will automatically create an Assembly Order for the total quantity on the Sales Order Line and ignore the quantity in stock that we would like to ship.