Definitions (3)
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.
2. Computing: Percentage of time a computer system is available for use. Formula: Uptime x 100 ÷ (Uptime + Downtime).
3. Quality control: Ability of an item to perform its designated function, whenever required.
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