Probability

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European Definition

ENISA

Probability is the extent to which an event is likely to occur. [1]


National definitions

United States

Likelihood that is expressed as a number between zero and one, where zero indicates that the occurrence is impossible and one indicates definite knowledge that the occurrence has happened or will happen, where the ratios between numbers reflect and maintain quantitative relationships. [2]



Standard Definition

ISO Guide 73:2009

Measure of the chance of occurrence expressed as a number between 0 and 1 where 0 is impossibility and 1 is absolute certainty. [3]


Other Definitions

Ontario (Canada)

Probability is the likelihood of an event occurring that may result in an emergency, disaster or service disruption. [4]


Probabilité: survenance prévisible d’un événement susceptible de causer une situation d’urgence, un sinistre ou une perturbation de services. [4]


See also

Notes

  1. ↑ ENISA Risk Glossary
  2. ↑ DHS Risk Lexicon 2010 Edition, September 2010
  3. ↑ ISO Guide 73:2009
  4. ↑ 4.0 4.1 Province of Ontario’s Emergency Management Glossary of Terms Cite error: Invalid <ref> tag; name "Ontario" defined multiple times with different content
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