Delivery block Control by item output in the sales order

Hi,

Can anyone please help me for the blow logic:

Requirement:

Item output should be triggered and processed when the delivery block is removed manually in the schedule line level in the sales order (VBEP-LIFSP).

For this, I have configured the output in the item output procedure. Output is getting triggered while creation of the sales order, but it should process when I will remove the delivery block in the schedule line level in the sales order. For this logic, I have asked the abaper to develop the logic in the output requirement routine, but they are not able to get the exact item structure to write the code.

so please help me on this.

Thanks.