We use cookies to understand how this site is used and to improve the site to make use easier. We also share details with Google for analytic purposes. For more information, and to understand the limited use we have for your data, see our privacy page.

If you do not want us to handle your data in this way you can eitherstop using this site or set your browser to request that we do not track you. Continued use of this site without setting do not track explicitly provides your authority to make limited use your data.


reasoned, auditable artefact created that supports the contention that its top-level claim (or set of claims), is satisfied, including systematic argumentation and its underlying evidence and explicit assumptions that support the claim(s)


This is a concrete item and can be implemented directly

Term: assurance case; 
Plural: assurance cases; 


Note 1 to entry: An assurance case contains the following and their relationships:

— one or more claims about properties;

— arguments that logically link the evidence and any assumptions to the claim(s);

— a body of evidence and possibly assumptions supporting these arguments for the claim(s); and

— justification of the choice of top-level claim and the method of reasoning.


Diagrammatic representation

Simple graph - assurance case

Required associations

Optional associations

a number of assurance cases evidences safety of one or more products
a number of assurance cases evidences security of one or more products
a number of risk management files provide evidence for a number of assurance cases


assurance case


assurance case