Exam 7: A reserve point estimate and its uncertainty are separate outputs
A reserving method can estimate an expected ultimate while a stochastic framework addresses variability. Process uncertainty, parameter uncertainty and model limitations should be distinguished. A precise-looking estimate does not imply narrow uncertainty.
Worked example or practice scenario
Two toy portfolios can have the same best estimate of unpaid claims, 10m, but different volatility because of claim sizes, tail length or data volume. A percentile or standard error must come from the stated model and assumptions; it is not determined by the point estimate alone.
Try this next
Explain which uncertainties an assigned model includes and which it omits. Compare one-year development uncertainty with ultimate uncertainty before using a result in a capital or reporting question.
Reading sources
ActNet editorial guide · October 1, 2026 · Original illustrative examples.