Abstract: The present invention is a data processing system and method for analyzing billing indices regarding billed telecommunications items. The system includes a data input mechanism for receiving the telecommunications bills; a database of pre-determined billing indices; a processor configured to compare the billed indices from the telecommunications bill against of the pre-determined indices, identify billing discrepancies, and generate deprovision requests and billing disputes based upon the billing discrepancies; and data output mechanisms for transmitting the deprovision requests and the billing disputes. The system and method also determines and corrects errors in the database of pre-determined billing indices, and identifies and accrues installed telecommunication components that are not included as the billed telecommunication items.