RELIABILITY

In general, 'reliability' (systemic def.) is the ability of a person or system to perform and maintain its functions in routine circumstances, as well as hostile or unexpected circumstances.
The IEEE defines it as ". . . the ability of a system or component to perform its required functions under stated conditions for a specified period of time."
'Reliability' may refer to:

★ Reliability (statistics), of a set of data and experiments

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★ High reliability is measured in "nines",

★ Reliabilism in philosophy and epistemology

★ Data reliability, a property of some disk arrays in computer storage.

★ Reliability engineering ensures a system will be reliable when operated in a specified manner

★ Reliability theory, as a theoretical concept, to explain biological aging and species longevity

★ Reliability (computer networking) is a category used to describe protocols.

★ High availability or uptime is the reliability of physical telecommunication networks and computers.