Revenue Assurance: Current revenue recognition systems have their own mechanisms for identifying discrepancies that could lead to revenue leakage. These processes or validations are based on operator cluster guidelines, review of amounts credited to subscribers, and revenue generated from usage recorded in billing systems. Careful cross-checking of the various metrics can alert revenue assurance teams to potential leakage, minimizing discrepancies in the calculation of earned and unearned revenue for prepaid and billed and unbilled revenue for postpaid.