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Reliability

Maturity:
Attributes of software that bear on the frequency of failure by faults in the software. (ISO 9126: 1991, A.2.2.1)

Fault tolerance:
Attributes of software that bear on its ability to maintain a specified level of performance in cases of software faults or of infringement of its specified interface. (ISO 9126: 1991, A.2.2.2)

Recoverability:
Attributes of software that bear on the capability to re-establish its level of performance and recover the data directly affected in case of a failure and on the time and effort needed for it. (ISO 9126: 1991, A.2.2.3)



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