Availability

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Availability | disponibilité | اتاحية | Verfügbarkeit | disponibilidad | toimintakelpoisuustila | disponibilità | 可用性 | beschikbaarheid | dyspozycyjność | disponibilidade | razpoložljivost | расположивост , ж јд | tillgänglighet

Definitions

European Definitions

ENTSO-E
Availability is a measure of time during which a generating unit, transmission line, ancillary service or another facility is capable of providing service, whether or not it actually is in service. [1]


EU JRC
For HVDC schemes, the term availability represents “energy availability”. Energy availability is the ability of a HVDC scheme to transmit, at any time, power up to the rated power. [2]
Hence, a converter scheme which can transmit 1.0 pu power for 100% of the time would have an energy availability of 100%. Any outage of the HVDC scheme or, for example, the outage of one pole in a bipole, will impact the energy availability, reducing the figure to less than 100%.


International Definitions

IAEA

Availability is the property of being accessible and usable upon demand by an authorized entity. [3]


ITU-T

The property of being accessible and useable upon demand by an authorized entity. [4]

Disponibilité: Propriété d'être accessible et utilisable sur demande par une entité autorisée. [5]

Disponibilidad: Propiedad de ser accesible y utilizable a petición por una entidad autorizada. [6]

可用性: 能够根据授权实体的要求进行访问和使用的特性. [7]


National Definitions

Argentina

Disponibilidad: se garantiza que los usuarios autorizados tengan acceso a la información y a los recursos relacionados con la misma, toda vez que lo requieran. [8]


Australia

Availability: The desired state that allows authorised users to access defined information for authorised purposes at the time they need to do so. [9]


Brazil

Disponibilidade: propriedade de que a informação esteja acessível e utilizável sob demanda por uma pessoa física ou determinado sistema, órgão ou entidade. [10]
Availability is the property that the information is accessible and usable upon demand by an individual or certain system, agency or entity.


Cameroon (Cameroun)

Disponibilité: critère de sécurité permettant que les ressources des réseaux de communications électroniques, des systèmes d’information ou des équipements terminaux soient accessibles et utilisables selon les besoins (le facteur temps). [11]


Canada

The state of being accessible and usable in a timely and reliable manner.

Condition d’être accessible et utilisable de manière fiable et en temps opportun. [12]


Colombia

Disponibilidad: Propiedad de que la información y sus recursos relacionados deben estar disponibles y utilizables cuando se los requiera. [13]


Czech Republic

Vlastnost přístupnosti a použitelnosti na žádost autorizované entity). [14]

Property of availability and usability at the request of an authorized entity.[15]



Ecuador

Disponibilidad: Se garantiza que los usuarios autorizados tengan acceso a la información y a los recursos relacionados con la misma, toda vez que lo requieran. [16]


Egypt

Availability: The degree to which a system, subsystem, or equipment is operable and in a committable state at the start of a mission, when the mission is called for at an unknown, i.e., a random, time. [17]
Note 1: The conditions determining operability and committability must be specified. Note 2: Expressed mathematically, availability is 1 minus the unavailability.

Availability: The ratio of (a) the total time a functional unit is capable of being used during a given interval to (b) the length of the interval. [17]
Note 1: An example of availability is 100/168 if the unit is capable of being used for 100 hours in a week. Note 2: Typical availability objectives are specified in decimal fractions, such as 0.9998.

Germany

Verfügbarkeit ist die Fähigkeit einer Einheit, eine angeforderte Funktion zu jedem beliebigen Zeitpunkt innerhalb eines vorgegebenen Zeitintervalls erfolgreich durchzuführen, unter der Voraussetzung, dass externe Ressourcen, soweit gefordert, vorhanden sind (ITU-T E.800). [18]

Die Verfügbarkeit A(t), engl. availability, einer Betrachtungseinheit ist die Wahrscheinlichkeit, dass die Betrachtungseinheit alle zugesicherten Eigenschaften bei den beschriebenen Umgebungsbedingungen zum beliebigen Zeitpunkt t einhält oder fehlerfrei funktioniert. [19]


Guatemala

Disponibilidad: Propiedad de ser accesible y utilizable a pedido de una entidad autorizada. Fuente: ISO/IEC 27000:20016 [20]


Hong Kong

可用性  : 獲授權一方可合理地接達及使用資訊或程序的狀態,包括及時 和重要的運作。

Availability: A condition in which information or processes are reasonably accessible and used by an authorised party including timely and critical operations. [21]



Iceland

Tiltækileiki: Merkir að upplýsingar séu aðgengilegar og þjónusta tiltæk þegar á þarf að halda, eða eins og mögulegt er svo sem við rafmagnsleysi, náttúruhamfarir, slys eða netárásir. [22]


India

The extent to which information or processes are reasonably accessible and usable upon demand, by an authorised entity, allowing authorised access to resources and timely performance of time-critical operations. [23]


Islamic Republic of Afghanistan

See Accessibility. [24]


Japan

アベイラビリティ/可用性: ある認可されたシステム主体によって要求されたとき、システムについての性能仕様に従って、アクセス可能であり、かつ、利用可能であるというシステムもしくはシステム資源の属性.

(Cyber) The property of a system or a system resource being accessible and usable upon demand by an authorized system entity, according to performance specifications for the system. [25]


Kingdom of Saudi Arabia

Availability: ensuring timely and reliable access to and use of information. (NISTIR 7298r2 Glossary of Key Information Security Terms) [26]

Luxembourg

Disponibilité: Propriété d’être accessible et utilisable à la demande par une entité autorisée. [27]


Mexico

Disponibilidad: Las dependencias y entidades serán responsables de que la información o datos contenidos en sus sistemas o aplicaciones para la prestación de servicios digitales cuenten y cumplan con un nivel de servicio comprometido entre ellas y, en su caso, con los usuarios. [28]


Morocco

Disponibilité: Objectif de sécurité qui consiste à assurer un accès permanent à l’information et aux services offerts par le système d’information. C’est une garantie de la continuité de service et de performances des applications, du matériel et de l’environnement organisationnel. [29]


Netherlands

[Dutch] Beschikbaarheid betreft het waarborgen dat vanuit hun functie geautoriseerde gebruikers op de juiste momenten tijdig toegang hebben tot informatie en aanverwante bedrijfsmiddelen (informatiesystemen). [30] [31]

[Dutch] Beschikbaarheid is de mate waarin informatie op de juiste momenten beschikbaar is voor gebruikers. [32]


Oman

Availability is the need to ensure that the business purpose of the system can be met and that it is accessible to those who need to use it. [33]


Peru

Disponibilidad: El sistema de control se considera disponible cuando toda la funcionalidad requerida está operando de acuerdo a cómo fue definida. [34]


Philippines

Availability - The property of being accessible and useable upon demand by an authorized entity; ensuring timely and reliable access to and use of information. [35]


Portugal

[Definição] - Disponibilidade: Em tecnologias da informação e da comunicação, capacidade de uma unidade funcional permanecer em estado de realizar uma determinada função dentro de condições determinadas, num dado instante ou num dado intervalo de tempo, supondo que estão assegurados os necessários meios exteriores. [36]


Serbia

расположивост је својство које значи да је податак доступан и употребљив на захтев овлашћених лица онда када им је потребан. [37]


Tanzania

Data availability - refers to how available data is when stored in some form, usually in reference to remote storage of data through a network or external storage media. [38]


United States

DHS
The property of being accessible and useable upon demand by an authorized entity. [39]

FISMA
Availability means ensuring timely and reliable access to and use of information. [40]

NIST
Availability: Ensuring timely and reliable access to and use of information. [39]

Availability: a requirement intended to assure that systems work promptly and service is not denied to authorized users. (from: NIST SP 800-12) [41]

Availability: The security objective that generates the requirement for protection against intentional or accidental attempts to (1) perform unauthorized deletion of data or (2) otherwise cause a denial of service or data. (from: NIST SP 800-33) [41]


Uruguay

Disponibilidad: Propiedad de mantener la información accesible a quien la necesita en el momento que la necesita. [42]


Standard Definition

IEC

Availability is the probability that an item is in a state to perform a required function under given conditions at a given instant in time, assuming that the required external resources are provided. [43]

Availability is the state of an item of being able to perform its required function. [44]

Disponibilité est l'état d'un dispositif capable de remplir la fonction requise. [44]


IETF

The property of a system or a system resource being accessible, or usable or operational upon demand, by an authorized system entity, according to performance specifications for the system. [45]

ISA

Availability is the probability that equipment will perform its task. [46]

Availability is the property of ensuring timely and reliable access to and use of control system information and functionality. [47]


ISO/IEC 27000:2014

Availability: the property of being accessible and usable upon demand by an authorized entity. [48]


See also

Notes

  1. ENTSO-E Glossary of Terms
  2. Definition of an assessment framework for projects of common interest in the field of smart grids, 2014
  3. IAEA - Nuclear Security Series Glossary Version 1.3 (November 2015)
  4. ITU Security in Telecommunications and Information Technology: An overview of issues and the deployment of existing ITU-T Recommendations for secure telecommunications, ITU-T, Geneva (2012) - ITU-T H.235.
  5. Sécurité dans les télécommunications et les technologies de l’information: Aperçu des problèmes et présentation des Recommandations UIT-T existantes sur la sécurité dans les télécommunications, ITU-T, Geneva (2012) - ITU-T X.800.
  6. Seguridad de las telecomunicaciones y las tecnologías de la información: Exposición general de asuntos relacionados con la seguridad de las telecomunicaciones y la aplicación de las Recomendaciones vigentes del UIT-T, ITU-T, Geneva (2012) - ITU-T X.800.
  7. 关于电信安全的若干议题综述 及相关ITU-T建议书应用简介, ITU-T, Geneva (2012) - ITU-T H.235.
  8. Oficina Nacional de Tecnologías de Información ADMINISTRACION PUBLICA NACIONAL Disposición 3/2013 - Apruébase la “Política de Seguridad de la Información Modelo” (2013)
  9. Protective Security Policy Framework - Glossary Oct 2017
  10. GUIA DE REFERÊNCIA PARA A SEGURANÇA DAS INFRAESTRUTURAS CRÍTICAS DA INFORMAÇÃO Versão 01 (Nov. 2010)/ Instrução Normativa Nº 1, de 13 de junho de 2008. Gabinete de Segurança Institucional da Presidência da República.
  11. LOI N°2010/012 DU 21 DECEMBRE 2010 RELATIVE A LA CYBERSECURITE ET LA CYBERCRIMINALITE AU CAMEROUN
  12. Vocabulaire de la gestion des urgencies/Emergency Management Emergency Management Vocabulary 281 (2012)
  13. Glosario MINTIC – ICT Ministry of Colombia
  14. Výkladový slovník kybernetické bezpečnosti (2013)
  15. Cyber Security Explanatory Glossary (2013)
  16. ESQUEMA GUBERNAMENTAL DE SEGURIDAD DE LA INFORMACION EGSI 2013
  17. 17.0 17.1 Glossary of the National Telecom Authority (NTA), Egypt
  18. BSI Glossary
  19. BSI Glossary
  20. La Estrategia Nacional de Seguridad Cibernética (June 2018)
  21. Glossary for Information Security Terms/資訊保安詞彙表
  22. [1]
  23. India's DGQA Cyber Security Policy (2015)
  24. National Cyber Security Strategy of Afghanistan (2014)
  25. RFC2828 (Japanese translation)
  26. Cyber Security Framework Saudi Arabian Monetary Authority Version 1.0 May 2017
  27. Glossaire
  28. Glosario - El portal único del gobierno. | gob.mx, Mexico
  29. DIRECTIVE NATIONALE DE LA SECURITE DES SYSTEMES D'INFORMATION, Marocco 2013
  30. Cyber Security Beeld Nederland 2018
  31. ABDO 2017
  32. Zakboekje Preventie Cybercrime (2008
  33. Oman CERT Glossary
  34. RESOLUCIÓN DE CONSEJO DIRECTIVO ORGANISMO SUPERVISOR DE LA INVERSIÓN EN ENERGÍA OSINERG Nº 270-2014-OS/CD
  35. DND GLOSSARY OF CYBER SECURITY TERMS (v.4)
  36. Glossário Centro National de Cibersegurança Portugal
  37. ЗАКОН О ИНФОРМАЦИОНОЈ БЕЗБЕДНОСТИ (Law on Information Security), Serbia
  38. [THE UNITED REPUBLIC OF TANZANIA/MINISTRY OF FINANCE -ICT SECURITY GUIDELINES (2012)]
  39. 39.0 39.1 NISTIR 7298 rev 2: Glossary of Key Information Security Terms, May 2013
  40. The Federal Information Security Modernization Act of 2014 (FISMA)44 U.S.C. § 3552(b)(2).
  41. 41.0 41.1 NIST Glossary
  42. Glossary CERTuy
  43. from IEV191-11-01
  44. 44.0 44.1 IEV 603-05-04
  45. IETF RFC449 Internet Security Glossary 2
  46. [ISA WG7]
  47. ISA-62443 series
  48. ISO/IEC 27000:2014, Information technology -- Security techniques -- Information security management systems -- Overview and vocabulary