Difference between revisions of "Likelihood"

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Revision as of 23:18, 11 December 2016


European Definitions

RESIN project

The RESIN project [1] gives the following definition:

The chance of a specific outcome occurring, where this might be estimated probabilistically. [2]

Other International Definitions

National Definitions


(I risikoanalyser) brukes ofte sannsynlighet som mål på hvor trolig vi mener det er at en bestemt hendelse vil inntreffe, gitt vårt kunnskapsgrunnlag. [3]

(In risk analyses) likelihood is often used as an expression of how likely we think it is that a specific event will occur, given our knowledge base. [4]

United Kingdom (UK)

Likelihood is the chance of an event or outcome occurring, usually expressed as a probability. [5]

United States

Estimate of the potential of an incident or event’s occurrence. [6]

Standard Definition


Likelihood is the quantitative estimation that an action, event or incident may occur. [7]

ISO 73:2009

Chance of something happening. [8]

Discussion Topic

See also


  1. http://www.resin-cities.eu/
  2. Mach, K.J., S. Planton and C. von Stechow (eds.). Climate Change 2014: Synthesis Report. Contribution of Working Groups I, II and III to the Fifth Assessment Report of the Intergovernmental Panel on Climate Change. Annex II: Glossary. [Core Writing Team, R.K. Pachauri and L.A. Meyer (eds.)]. IPCC, Geneva, Switzerland, pp. 117-130.
  3. DSB, National Risikobild 2014
  4. DSB, National Risk Analysis 2014
  5. The National Adaptation Programme: Making the country resilient to a changing climate, UK Government (2013)
  6. DHS Risk Lexicon 2010 Edition, September 2010
  7. ISA WG7; IEC 62443-2-1(2010-11)
  8. ISO Guide 73:2009 Risk management -- Vocabulary