Hi Madhu
What exactly happened was they are copying the data to excel file and after making required changes copying back to text files and loading them into the system.
If they are doing this via SPRO mass load transactions, then that will bypass WF. I would only grant those transactions via FF Id so you still have a log of them being used.
It all comes back to a design and to think through how the rule set is maintained.
Regards
Colleen