How to transform an item from revision A to revision B?

Summary:

Business scenario - A Work Order is in progress for item revision A with lots of materials issued and operations completed. Meanwhile an item revision B is created in PIM and a couple of components are added to the item structure as part of the revision. We need to continue with the current WO and ensure that it completes and produces revision B. So we report those additional material components and essentially what is being produced is same was what would be in the revision B. However the system still produces revision A and we cannot select revision B as