Usage of alternative units of measure

If the issuing unit of measure is defined in the material master, subitems are now created in the issuing unit of measure. Otherwise, subitems are created in the base unit of measure

Manual or automatic interchangeability in creation of stock transport orders

Subitems are created with subitem category P (not '8', however, you can continue to process existing STOs with subitem category 8). This means that you can only change the quantity or delivery date of the main item. When you make such a change, this automatically triggers a new ATP check, which creates new subitems. The ATP popup appears displaying the available exchangeable materials, their available quantities, and you can manually choose the quantity you require. In Customizing for Logistics - General -> Interchangeability of Parts -> Define Settings for Material Exchange and Restricted Interchangeability, you must set the material exchange to Automatic or Manual for pseudo process code STOME.

Automatic interchangeability in stock transport orders

If the ATP check fails during creation of the STO, the system carries out an automatic material exchange. Automatic material exchange is only possible if you set the reaction of message number 450 (application area 06) to 'E' (error message) or 'W' (warning message). You do this in Customizing for Materials Management under Purchasing -> Environment Data -> Define Attributes of System Messages -> System Messages.