Before the eligibility and entitlement engine can process reassessment details for a nominee, it must define the reassessment period. The eligibility and entitlement engine defines the reassessment period on a nominee by nominee basis using a combination of the eligibility and entitlement engine from date, the cover to date of the case, the nominee component assignment start and end dates, and the nominee delivery pattern frequency. To define the reassessment period start date, the eligibility and entitlement engine uses either the eligibility and entitlement engine from date or the nominee component assignment start date. The eligibility and entitlement engine uses the eligibility and entitlement engine from date for nominees whose component assignment start date is set to the case start date; otherwise, it uses the nominee component start date. To define the reassessment period end date, the eligibility and entitlement engine uses either the cover to date of the case or the nominee component assignment end date. The eligibility and entitlement engine uses the cover to date of the case for nominees with no component assignment end date; otherwise, it uses the nominee component assignment end date. As part of defining the reassessment period, in addition to defining the start and end dates of the reassessment period, the eligibility and entitlement engine returns a list of all delivery dates, beginning with the start date of the reassessment period and ending on the end date of the reassessment period. This list of dates is used for comparing the processed ILIs to the financial data for the virtual financial components.