No single method is perfect. Actuaries typically run multiple methods, compare the results, and select a point estimate —often the mean or a conservative (higher) estimate, such as the 75th percentile. The final reserve is critical for financial statements (Schedule P for statutory filings) and for calculating the insurer's surplus to ensure solvency.
For anyone entering the insurance industry—as an underwriter, claims adjuster, financial analyst, or student of actuarial science—mastering these two topics is non-negotiable. They are the twin engines of every solvent, fair, and functioning property and casualty insurance market. No single method is perfect
Ratemaking and loss reserving are complex processes that involve significant uncertainty and variability. Some of the key challenges facing P&C insurers include: Some of the key challenges facing P&C insurers
For more in-depth study, resources like the 2nd Edition of "Introduction to Ratemaking and Loss Reserving for Property and Casualty Insurance" by ACTEX Publications provide a deeper dive into the technical aspects. compare the results