TRAK-Community

Version & Date

5th September 2015

Configuration History

See change record for the TRAK metamodel at http://trakmetamodel.svn.sourceforge.net/viewvc/trakmetamodel/trunk/?view=log

Definition

Part of the TRAK Management Perspective.

Testimony or facts tending to prove or disprove any conclusion or something serving as a proof.

OED - Argument - (accessed August 08, 2013)

Tests For

Tests Against

Attributes

• evidence identifier
• evidence identification

+ Inherited Attributes Document

Covered by TRAK IPR and licenses

Implementation of TRAK Attribute Names and Values

The implementation of TRAK attributes in a tool is controlled by ‘TRAK. Implementation. Architecture Description Elements’ with respect to the case, spelling of attributes and format of values. See References section below.

Relationships

Evidence participates in the following relationships:

• Evidence is a Document
• Evidence has part Evidence
• Evidence supports Argument
• Evidence opposes Argument
• Evidenceproves Claim
• Evidence disproves Claim

Inherited relationships:

+ from Document

• Document has part Evidence
• Document traces to Evidence
• Evidence has part Document

+ from Architecture Description Element

• Claim about Evidence
• Concern about Evidence
• Standard governs Evidence
• Contract governs Evidence
• Standard governs Evidence
• Evidence satisfies Contract
• Evidence satisfies Requirement
• Evidencesatisfies Standard
• Evidence traces to Argument
• Evidence traces to Document
• Evidence traces to Requirement

Covered by TRAK IPR and licenses

Master Architecture View

Any Evidence used within an architecture description of the system-of-interest must appear on a MV-04 Assurance View for the architecture description.

The MV-04 is the Master Architecture View for Evidence .

Covered by TRAK IPR and licenses

Comments

Evidence is a fundamental part of the Claim - Argument - Evidence (CAE) structure used in describing the structure of an assurance case such as that used for safety assurance (or a safety case as it used to be called in “old money”). Evidence is essential to the substantiation of any claim and the support or opposition of any argument.

The Evidence element together with the structured argument(s) supports planning for the gathering of the evidence needed.

For the (design) verification against a requirement there is typically the following structure in terms of Claim - Argument Evidence:-

1. System of Interest / Part X meets the requirement to ... [the Claim]
2. System of Interest is able to .... under .... whilst [the Argument]
3. Report CC paragraph of the cold soak environmental test shows that [quote the statement that answers the claim directly] [the Evidence]

In TRAK evidence takes the form of a document artefact which can therefore include any type of media. Evidence identification captures identifies statement(s) that offer proof and define artefact as evidence.

Covered by TRAK IPR and licenses

Other Frameworks

Neither MODAF nor the NATO Architecture Framework are able to represent an item of Evidence within their metamodels.

 

Category:Metamodel -> Stereotype

Categories:

• Metamodel
  • Stereotype