Assurance case

Develop assurance cases online
with NOR-STA web application

  • develop arguments and share with others,
  • integrate assurance case with  evidence in online repositories,
  • create GSN diagrams,
  • make assessment and communicate the results,
  • manage argument modules and use templates,
  • report the results online,
  • integrate the assurance process with other tools.

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Develop GSN assurance cases

The Goal Structuring Notation (GSN) is the most popular graphical notation for assurance cases. In NOR-STA you can develop GSN assurance cases and generate argument and architecture view diagrams. NOR-STA implements Core GSN and partially Modular Extension and Argument Pattern Extension.


NOR-STA argument metamodel complies with OMG SACM and ISO/IEC 15026.

read Introduction to Assurance Cases

Assurance case tool - GSN Diagram
Modular assurance case

Manage complex modular arguments

Divide large arguments into modules and manage them separately. Argument modules can be bound with interfaces and the assessment of supporting modules will be automatically reported to high-level argument modules.

Modules are also an effective tool to distribute work in teams and organizations. For each module you can individually assign permissions for users.

Integrate your arguments with evidence

The argument needs to refer to evidence produced in the system life cycle which is stored in some repositories, usually in version control systems.

NOR-STA provides ready to use integration with SharePoint, Confluence and Jira. Integration with other types of repositories can be provided on request.

NOR-STA monitors changes of evidence in integrated repositories, reports them and enables systematic change management.

Assurance case evidence management
Assurance case assessment

Argument assessment

  • Integrated argument assessment functions
  • Dedicated roles for reviewers and third-party assessors
  • Sharing comments to argument elements
  • Control of argument changes and the need for reassessment
  • Assessment methods include uncertainty, scoring and others
  • Automatic aggregation of assessment results
  • Reporting assessment results
  • Control of negative and missing assessments

Reporting progress and results

  • Assessment visualization with a color scale
  • Reports to MS Excel, Word, PDF and HTML
  • Custom report templates fed with XML data
    describing the argument and assessment results
  • Custom report content: GSN diagrams, assessment,
    charts, links to evidence
  • Programmable HTML reports with XSL scripts

assurance case reporting
collaborative assurance case development

Users and permissions management

  • Role-based access control (RBAC)
  • Predefined roles like manager, editor, auditor, reader
  • Roles granted at the level of folders
    or individual argumentation modules
  • Customizable user roles
    with over 40 permissions to specific actions

Reuse with templates

  • Create assurance cases based on templates
  • Use parametrized templates for variants of your system or products
  • Update arguments to new template versions
  • Use multiple levels of templates

assurance case templates
assurance case change history

Change tracking

  • Full change history and project log
  • Monitor and react to changes of the argument or evidence
  • View snapshots of the argument for a given day
  • Restore the argument for any date from a snapshot

System assurance monitoring

Assurance case may be fed with live data from any evidence management system or production system monitoring. Data can be automatically transferred into an argument and can be used to:

  • update the evidence data,
  • update the assessment,
  • deactivate or activate argument sections,
  • modify argument structure.

read more

live data integration with assurance cases
NOR-STA integration sith other systems

Integration with other systems

  • Integration with SharePoint, Atlassian Jira and Confluence
  • Custom integration through NOR-STA API (web services)
  • User authentication with external identity providers:
    ADFS, Azure AD
  • XML data import and export

Understandable and defensible arguments – this is important when we develop assurance cases.

If you want to develop better assurance cases we invite you join to our online Assurance Case Training on September 15.

During the training we will introduce the concept of an assurance case and how to develop strong arguments.

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