Hi Kamal,
MD16 is the tcode for mass deletion of planned orders. You can delete based on MRP controller, Material etc.
Go to MD16 - Input MRP controller and click on Find. Enter Plant, MRP Controller and end selection date and click on continue. System will display all the planned orders for the respective MRP controller. Select all planned orders and click on Delete. All the planned orders will be deleted.
VP planned orders are generated based on strategy 50. These planned orders are un convertable planned orders. You cannot delete these planned orders. Once the sales order is received upon MRP run PIR gets consumed and un convertable planned orders chnages to convertable planned order for the sales order quantity. If want to delete these planned orders then PIR for Finished Material make it as inactive and run MRP. Thereafter all the unconvertable planned orders gets deleted. Then make the PIR for the Finished product as active.
Thanks & Regards,
Ramagiri