availability
Definition 1
General: Characteristic of a resource that is committable, operable, or usable upon demand to perform its designated or required function. It is the aggregate of the resource's accessibility, reliability, maintainability, serviceability, and securability.
Definition 2
Computing: Percentage of time a computer system is available for use. Formula: Uptime x 100 ÷ (Uptime + Downtime).
Definition 3
Quality control: Ability of an item to perform its designated function, whenever required.
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