Unavailability (original) (raw)
Unavailability, in mathematical terms, 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 3.46 × 10−8.
| Property | Value |
|---|---|
| dbo:abstract | Unavailability, in mathematical terms, 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 3.46 × 10−8. (en) |
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| dbo:wikiPageWikiLink | dbr:Calculation dbr:Fault_tree_analysis dbr:Time dbr:Exponential_distribution dbr:Probability dbr:Reliability_block_diagram dbr:Telecommunication dbc:Systems_engineering dbr:System dbr:Availability dbr:Poisson_distribution dbr:Numerical_value |
| dbp:wikiPageUsesTemplate | dbt:Reflist |
| dct:subject | dbc:Systems_engineering |
| gold:hypernym | dbr:Probability |
| rdfs:comment | Unavailability, in mathematical terms, 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 3.46 × 10−8. (en) |
| rdfs:label | Unavailability (en) |
| owl:sameAs | freebase:Unavailability freebase:Unavailability wikidata:Unavailability https://global.dbpedia.org/id/fXSk |
| prov:wasDerivedFrom | wikipedia-en:Unavailability?oldid=1118110330&ns=0 |
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| is dbo:wikiPageWikiLink of | dbr:United_States_Deputy_Secretary_of_Transportation dbr:Index_of_electronics_articles dbr:High_availability dbr:Unavailable |
| is foaf:primaryTopic of | wikipedia-en:Unavailability |