GSN Patterns

Safety Margin

Posted by GSNAdmin on December 07, 2011
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The intent of this pattern is to create arguments that instil a high degree of confidence in the satisfaction of a goal and are resilient to change and criticism.

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Diverse Argument

Posted by GSNAdmin on December 07, 2011
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The intent of this pattern is to create arguments that instil a high degree of confidence in the satisfaction of a goal and are resilient to change and criticism.

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Control System Architecture Breakdown Argument

Posted by GSNAdmin on December 07, 2011
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The intent of this pattern is to illustrate a means of structuring an argument to support a system safety goal (requirement, avoidance of hazard etc.) by decomposition over a generic control system model.

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Hazard Directed Integrity Level Argument

Posted by GSNAdmin on December 07, 2011
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This pattern is intended to argue that a (sub)system has been developed to an integrity level appropriate to the hazards to which the system contributes.

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As Low As Reasonably Practicable

Posted by GSNAdmin on December 07, 2011
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This pattern provides a framework for arguing that identified risks in a system have been sufficiently addressed in accordance with the ALARP principle.

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