Deleting PRTs from an Operation 
1. From the Maintenance Processing screen, call up the required order using Orders
® Change or List editing.2. Select the operation overview of the order.
3. In the operation overview, select those operations to which PRTs are assigned which you want to delete.
4. Choose PRT (production resource/tool).
The system processes the operations you have selected one after another.
The PRT List for Operation screen appears for the first operation selected.
5. Select the PRTs you want to delete and choose Edit
® Delete. The system now performs one of the following activities: