C2_ARAS Argumentation Assurance Viewpoint
| Domain | Aspect | Maturity |
|---|---|---|
| Common | Taxonomy & Structure |  released |
Purpose
The Argumentation Assurance Viewpoint presents claims backed up by arguments that are supported by evidence, together with the possibility to counter such claims in a similar manner.
Applicability
The Argumentation Assurance Viewpoint supports the ability to present an evidence pattern, a structure of claims, arguments, and evidence, which is a common need in systems engineering. It applies equally to the establishment of traceability, definition of safety assurance cases, and even the presentation of business cases.
Supported Processes
Supported Information Items
Presentation
A block definition diagram (BDD) featuring a claim-argument-evidence pattern (CAE).
Stakeholder
Concern
Exposed Concepts
The Diagram shows the concepts exposed by the viewpoint, and related concepts if necessary.
The Table shows the concepts exposed by the viewpoint, and related concepts if necessary.
| Concept | Documentation |
|---|---|
| Argument | An argument is a rule that provides the bridge between what we know or are assuming (sub-claims, evidence) and the claim we are investigating. The argument used depends on the type, trustworthiness and extent of available evidence and the nature of the claim. |
| Evidence | An evidence is an artifact that establishes facts that can be trusted and lead directly to a claim. In projects there can many sources of information, but what makes this evidence is the support or rebuttal it gives to a claim. |
| Claim | A claim is a true/false statement about a property of a particular object. A claim is just what you might consider it to be from common usage of the term; an idea that someone is trying to convince somebody else is true. An example claim could be made on a train, e.g., the train is safe. |
| Subject of Claim | Note: A claim cannot be generic, it has to be about something, it has to have a defined subject, e.g., system safety. |
| EVCreinforcingAGT | Specifies the fact that an argument is reinforced by one or more evidence via a argument-evidence relation. |
| CLTmakingCLM | Specifies the fact that a claim is made by a defined claimant. |
| CounterClaim | A party's claim is a counter-claim if one party asserts claims in response to the claims of another. |
| CLMbeingMadeAboutSBC | Specifies the fact that a claim is made about an identified subject matter. |
| Claimant | A party asserting claims. |
| CCMcounteringCIM | Specifies the fact that any claimable item, e.g., claim, argument, and evidence, is countered by one or more claims. |
| CLMsupportingCIM | Specifies the fact that any claimable item, e.g., claim, argument, and evidence, is supported by one or more claims. |
| AGTsupportingCLM | Specifies the fact that a claim is supported by one or more arguments via a claim-argument relation. |
| Refuter | A party asserting counter-claims. |
Realization of exposed Concepts
The Diagram shows the realization of exposed concepts.
The Table shows the realization of exposed concepts.
Related Viewpoints
Required Viewpoints
Recommended Viewpoints
Example
