Availability
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Contents
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]
United States
NIST
Ensuring timely and reliable access to and use of information. [2]
The property of being accessible and useable upon demand by an authorized entity. [2]
Standard Definition
ISO/IEC 27000:2014
Property of being accessible and usable upon demand by an authorized entity[3].