The state or quality of being reliable; reliableness.

Reliability means the capacity of the tyre in terms of quality of maintaining its performance unchanged in time, with specific reference to driving safety.

the quality of sound and consistent performance or behaviour

The quality of accounting information that makes it dependable in representing the events that it purports to represent.

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Consistency or dependability of data and evaluation judgements, with reference to the quality of the instruments, procedures and analyses used to collect and interpret evaluation data. Source: OECD Glossary of Key Terms in Evaluation and Results Based Management