Crossword clues for unavailability
unavailability
Douglas Harper's Etymology Dictionary
1855, from un- (2) "opposite of" + availability, or else from unavailable + -ity.
Wiktionary
n. The state of being unavailable
WordNet
n. the quality of not being unavailable when needed [syn: inaccessibility] [ant: handiness, handiness]
Wikipedia
Unavailability is the probability that an item will not operate correctly at a given time and under specified conditions. It opposes availability.
Numerical values associated with the calculation of availability are often awkward, consisting of a series of 9s before reaching any significant numerical information (e.g. 0.9999999654). For this reason, it is more convenient to use the complement measure of availability, namely, unavailability. Expressed mathematically, unavailability is 1 minus the availability. Therefore, a system with availability 0.9999999654 is more concisely described as having an unavailability of 3.46E-8.
Unavailability may be expressed mathematically as the ratio,
U = MTTR/(MTTR+MTTF)where MTTR is the mean time to repair, and MTTF is the mean time to failure. Alternatively, this can be written as
U = λ'/(λ'+μ')where λ' is the critical failure rate (λ without the tick is the total failure rate) and μ' is the critical repair rate (rate at which critical failures are repaired).
In telecommunication, an unavailability is an expression of the degree to which a system, subsystem, or equipment is not operable and not in a committable state at the start of a mission, when the mission is called for at an unknown, i.e. random, time. The conditions determining operability and committability must be specified.
Usage examples of "unavailability".
The matches had been halted by an unavailability of suitable pugilists in the Great War, and the old glass roof had been demolished by a stray bomb in the next.
She certainly would have noted Vandros's unavailability because of his longstanding attachment to Felina, and his likely ascension to the dukedom.
She certainly would have noted Vandros’s unavailability because of his longstanding attachment to Felina, and his likely ascension to the dukedom.