Availability

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The degree to which a system or component is operational and accessible when required for use. [ ISO/IEC 20000 ]

Other Definitions

Availability [ ISO/IEC 20000
Ability of a component or service to perform its required function at a stated instant or over a stated period of time.

Notes

  • Often expressed as a probability. Availability is usually expressed as a ratio of the time that the service is actually available for use by the business to the agreed service hours. [ ISO/IEC 25000 ]

See also

Glossary:

Standards:

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