# quantitative risk assessment

Risk assessments relying on quantitative (probabilistic) modelling, typically of complex engineering processes and systems (cf. qualitative risk assessment). Numerical estimates are made of the probability that a defined harm will result from the realization of specific hazards. Data must be sufficiently reliable and detailed for the purpose, and the mathematical methods used open to scrutiny.

This definition is abridged from **A – Z of tree terms: A companion to British arboriculture**.

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