Risk assessment is the determination of
quantitative or
qualitative estimate of risk related to a concrete situation and a recognized
threat (also called
hazard).
Quantitative risk assessment requires calculations of two components of
risk (R): the magnitude of the potential loss
(L), and the probability
(p) that the loss will occur.
Acceptable risk is a risk that is understood and tolerated usually because the cost or difficulty of implementing an effective countermeasure for the associated vulnerability exceeds the expectation of loss. "Health risk assessment" includes variations, such as risk as the type and severity of response, with or without a probabilistic context.