Creating a Change Master Record 
Procedure
When you confirm, the system sets the valid-from date from the change master record, provided that documents can be processed with reference to the change number.
If the document is allocated to an alternative date in the change master record, the change is valid as of this alternative date rather than the valid-from date in the change master header.
Additional Checks for an Engineering Change Order
There are additional checks for an engineering change order.
See also:
Change Processes Using an Engineering Change RequestSee also:
Checks for Document Release