As part of our manufacturing process we outsource components or services that we cant establish as individual stock items. For example, part of production might involve sending elements off to be powder coated before they are sent back to us for being assembled. We raise a PO for these services using a non-stock inventory code.
I am yet to find a way to record these costs on the production order, they are expensed on receipt and unlike a true inventory item they don't backflush and cant be allocated as cost to the production order.
As a result our cost of production is never 100% accurate as these service elements are never included.
Has anyone found a solution to this?