How can I change the UOM of a part?
Until the part is used in the rest of the application, it remains possible to change the unit of measure of stock of that product. However, you will no longer be able to change that information as soon as it has been referenced in:
A stock movement, or
A commercial document (quotation, sales order, despatch note, customer invoice, or their equivalent in purchasing), or
A works order, either as finished good or as component.