Stage 4: Analysing Risk

As explained, risk comprises two elements, likelihood and severity, both of which need to be analysed as part of risk assessment. Severity of harm is the “seriousness” of the outcome of an accident, ie anything from minor injury to death, to one person or to many. The likelihood of harm is the estimated probability of the harm occurring, ie never to very likely. The analysis of the factors of severity and likelihood is important to enable a balance of risk against the costs of the measures provided/to be provided.


Factors affecting severity of risk include:

  • numbers of people that may be affected

  • level of energy, eg voltage, pressure, heat, noise

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