Availability

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Definitions

European Definitions

ENTSO-E
Availability is a measure of time during which a generating unit, transmission line, ancillary service or another facility is capable of providing service, whether or not it actually is in service. [1]


National Definitions

Czech Republic

Property of availability and usability at the request of an authorized entity (Vlastnost přístupnosti a použitelnosti na žádost autorizované entity). [2]


United States

NIST
Ensuring timely and reliable access to and use of information. [3]


DHS
The property of being accessible and useable upon demand by an authorized entity. [3]


Standard Definition

ISO/IEC 27000:2014

Property of being accessible and usable upon demand by an authorized entity[4].


See also

Notes