The Company computes future insurance policy benefits primarily using the net premium method based on anticipated investment yield, mortality (morbidity on health insurance) and withdrawals. Liabilities for future insurance policy benefits on certain short-term medical coverages were computed using completion factors and expected loss ratios derived from actual historical premium and claim data. These methods are widely used in the life and health insurance industry to estimate the liabilities for future insurance policy benefits. Inherent in these calculations are management and actuarial judgments and estimates (within industry standards) which could significantly impact the ending reserve liabilities and, consequently, operating income. Actual results may differ, and these estimates are subject to interpretation and change. Management believes that the Company's method of estimating the liabilities for future insurance policy benefits provides a reasonably accurate level of reserves at December 31, 2002, however, if the Company's reserves are insufficient to cover its actual losses and loss adjustment expenses, the Company would have to augment its reserves and incur a charge to its earnings, and these charges could be material.
The Insurance Group normally provides cash flow from (i) operations; (ii) the receipt of scheduled principal payments on its portfolio of fixed income securities; and (iii) earnings on investments. Such cash flow is used partially to finance liabilities for insurance policy benefits. These liabilities represent long-term and short-term obligations which are calculated using certain assumed interest rates.
The Company maintains loss reserves to cover the its estimated liability for unpaid losses and loss adjustment expenses, including legal and other fees as well as a portion of the Company's general expenses, for reported and unreported claims incurred as of the end of each accounting period. Because setting reserves is inherently uncertain, the Company cannot be sure that current reserves will prove adequate in light of subsequent events. If the Company's reserves are insufficient to cover its actual losses and loss adjustment expenses, the Company would have to augment its reserves and incur a change to its earnings, and these charges could be material. Reserves do not represent an exact calculation of liability. Rather, reserves represent an estimate of what the Company expects the ultimate settlement and administration of claims will cost. These estimates, which generally involve actuarial projections, are based on the Company's assessment of facts and circumstances then known, as well as estimates of future trends in claims severity, frequency, judicial theories of liability and other factors. These variables are affected by both internal and external events, such as changes in claims handling procedures, inflation, judicial trends and legislative changes. Many of these items are not directly quantifiable in advance. Additionally, there may be a significant reporting lag between the occurrence of the insured event and the time it is reported to the Company. The inherent uncertainties of estimating reserves are greater for certain types of liabilities, particularly those in which the various considerations affecting the type of claim are subject to change and in which long periods of time may elapse before a definitive determination of liability is made. Reserve estimates are continually refined in a regular and ongoing process as experience develops and further claims are reported and settled. Adjustments to reserves are reflected in the results of the periods in which such estimates are changed.