As part of determining the reassessment details for the reassessment period, the eligibility and entitlement engine retrieves the processed ILIs during the reassessment period, creates in memory financial data for the virtual financial components, and compares the financial data to the processed ILIs to determine if any over or underbillings exist. If an over or underbilling is found, the eligibility and entitlement engine records the over or underbilling details and initiates over or underbilling processing.