How to add the delete button

Hello Guru's and Experts.

I am working on a change request , the change request is as follows

Once a cost simulation is run for a maintenance item and the data transferred to BI, it cannot be deleted from BI, only overwritten with an updated cost simulation. In the instance where the such items are no longer required to be included in the simulation, it must be made possible to delete the simulation costs in BI.

The current design in my project significantly increases the effort required to identify unwanted cost simulations and greatly increases the potential for incorrect data to be used in Budgeting and forecasting.

My question is how to add the delete functionality in the report. is it acheavable through the portal or WAD,

iam new to SAP BI , if possible can anyone kindly suggest me the steps to do this functionality.

Appreciate your quick response..

Thanks

Ravi.