reliability

noun

1. (uncountable, usually)The quality of being reliable, dependable, or trustworthy.

   “Above all, rail needs to be boring. By that, I mean that it must run its timetable reliably, day-in and day-out. Punctuality and reliability remain the bedrock of a successful railway.”

2. (uncountable, usually)the ability to measure the same thing consistently (of a measurement indicating the degree to which the measure is consistent); that is, repeated measurements would give the same result (See also validity).
3. (uncountable, usually)measurable time of work before failure