Difference between revisions of "Common Cause Failure"
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− | A common cause failure (CCF) is a failure where: | + | <big>A common cause failure (CCF) - also refered to as [[Common Mode Failure]] - is a failure where: |
− | * The function of multiple CI is disrupted or destroyed by the same cause or hazard affecting | + | * The function of multiple ([[CI|critical]]) infrastructures is disrupted or destroyed by the same cause or [[hazard]] affecting these ([[CI|critical]]) infrastructures at the same location or area in the same time frame (e.g., a hurricane blocking roads and affecting telecommunication and power lines; a collapsed bridge which blocks inland shipping, road transport and caused disruption of gas, power and telecommunication lines) |
− | * Item failures result from a single shared cause and coupling factor (or mechanism) | + | * Item failures result from a single shared cause and coupling factor (or mechanism)</big> |
+ | <br /> | ||
==Definitions== | ==Definitions== | ||
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=== European Definitions === | === European Definitions === | ||
− | + | ==== [[EWICS]] ==== | |
− | === | + | {{definition|Common Cause Failure is a [[failure]] that is the result of one or more [[Event|events]], causing concurrent failures of two or more separate channels in a multiple channel system, leading to a failure. <ref>[http://www.ewics.org/docs/home European Workshop on Industrial Computer Systems Reliability, Safety and Security (EWICS) paper WP1512]</ref>}}<br/><br/> |
+ | <!-- | ||
+ | === Other International Definitions === | ||
--> | --> | ||
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=== National Definitions === | === National Definitions === | ||
− | + | ==== [[Australia]] ==== | |
− | ==== | + | {{definition|Common mode failure is the coincident failure of two or more independent components as the result of a single cause; of particular concern in an instrument system incorporating [[Redundancy |redundancy]] where an [[event]] causes coincident failure of two or more of the normally independent channels. <ref name="MAIMAus">[https://www.em.gov.au/Documents/Manual03-AEMGlossary.PDF Australian Emergency Management Glossary, Emergency Management Australia (1998)]</ref>}}<br /> |
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+ | === International Definitions === | ||
+ | ==== [[IAEA]] ==== | ||
+ | {{definition|Common Cause Failure is the failure of two or more structures, systems or components due to a single event or cause. <ref name="IAEA">[http://www-pub.iaea.org/mtcd/publications/pdf/pub1290_web.pdf IAEA Safety Glossary (2007)]</ref>}}<br /> | ||
+ | {{definition|Common mode failure is the failure of two or more structures, systems or components ''in the same manner or mode'' due to a single event or cause. <ref name="IAEA">[http://www-pub.iaea.org/mtcd/publications/pdf/pub1290_web.pdf IAEA Safety Glossary (2007)]</ref>}}<br /> | ||
+ | <!-- | ||
===Standard Definition=== | ===Standard Definition=== | ||
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== Discussion Topic == | == Discussion Topic == | ||
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==See also== | ==See also== | ||
<!-- Add links to related terms --> | <!-- Add links to related terms --> | ||
− | [[ | + | *[[Geographical Dependency]] - incorrect term often used for Common Cause Failure |
==Notes== | ==Notes== | ||
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<!-- Add category, i.e. [[Category:Main]] --> | <!-- Add category, i.e. [[Category:Main]] --> | ||
[[Category:Dependency]] | [[Category:Dependency]] | ||
− | [[Category: | + | [[Category:Incident]] |
+ | [[Category:Threat]] | ||
+ | [[Category:Risk]] | ||
+ | {{#set:defined by=IAEA|defined by=Australia|defined by=EWICS}} | ||
+ | {{#set: Showmainpage=Yes}} |
Latest revision as of 23:37, 28 June 2019
A common cause failure (CCF) - also refered to as Common Mode Failure - is a failure where:
- The function of multiple (critical) infrastructures is disrupted or destroyed by the same cause or hazard affecting these (critical) infrastructures at the same location or area in the same time frame (e.g., a hurricane blocking roads and affecting telecommunication and power lines; a collapsed bridge which blocks inland shipping, road transport and caused disruption of gas, power and telecommunication lines)
- Item failures result from a single shared cause and coupling factor (or mechanism)
Contents
Definitions
European Definitions
EWICS
Common Cause Failure is a failure that is the result of one or more events, causing concurrent failures of two or more separate channels in a multiple channel system, leading to a failure. [1]
National Definitions
Australia
Common mode failure is the coincident failure of two or more independent components as the result of a single cause; of particular concern in an instrument system incorporating redundancy where an event causes coincident failure of two or more of the normally independent channels. [2]
International Definitions
IAEA
Common Cause Failure is the failure of two or more structures, systems or components due to a single event or cause. [3]
Common mode failure is the failure of two or more structures, systems or components in the same manner or mode due to a single event or cause. [3]
Discussion Topic
See also
- Geographical Dependency - incorrect term often used for Common Cause Failure
Notes
References