Reliability

Reliability is a measure of the probability that a product will not malfunction or fail within a specified time period.

Definitions

According to Marketing Management by Keller and Kotler (15th edition),

Reliability. A measure of the probability that a product will not malfunction or fail within a specified time period.

According to Managing Quality by Foster (6th edition),

Reliability. Propensity for failure of a product or component.

According to Juran's Quality Handbook by Defeo (7th edition),

Reliability. The ability of a product to perform a required function under stated conditions for a stated time; or more simply, the chance that a product will work for the required time. In the context of Lean, the ability to supply a product or service on or before the date promised.