GSN Safety Case Builder

Safety Case ExcellenceTailored, Traceable, and Defensible

Build comprehensive safety cases with structured claim-argument-evidence using proven patterns. Automatically map evidence to ISO 26262 work products and maintain complete traceability throughout your project lifecycle.

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25+
Patterns
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10+
Question Sets
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40+
Evidence Types
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GSN
Export
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Question-Driven Tailoring

Answer targeted questions about your project context, ASIL, development lifecycle, and safety requirements to automatically instantiate the most appropriate argumentation patterns. Smart questionnaire adapts based on your responses for optimal safety case structure.

AdaptiveContext-aware
Start questionnaire
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Argumentation Patterns

25+ proven safety argumentation patterns based on industry best practices and ISO 26262 requirements. Includes patterns for ASIL decomposition, freedom from interference, systematic capability, and more. Each pattern provides clear claim-argument-evidence structure.

25+ PatternsProven
Browse patterns
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Evidence Mapping

Automatically link ISO 26262 work products, verification results, test reports, and analysis documents to your safety case claims. Maintain bidirectional traceability between safety arguments and supporting evidence for complete audit readiness.

40+ TypesBidirectional
Map evidence
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ASIL-Specific Tailoring

Receive ASIL-appropriate recommendations for argumentation depth, evidence requirements, and rigor level. Automatically adjust safety case complexity based on ASIL A, B, C, or D classifications with tailored templates for each level.

ASIL A-DCompliant
Configure ASIL
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GSN Export

Export your complete safety case to industry-standard Goal Structuring Notation (GSN) format for seamless integration with external tools and stakeholder reviews. Supports both visual diagrams and structured text formats.

GSN FormatStandard
Export to GSN
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History & Versioning

Track safety case evolution across project releases and design iterations. Complete version control with change history, impact analysis, and comparison views. Understand how your safety arguments have evolved and ensure consistency across updates.

Version ControlChange Tracking
View history

Frequently Asked Questions

Common questions about safety case tailoring and GSN

Safety case tailoring is the process of building a structured safety argument that demonstrates your product meets ISO 26262 requirements. Our tool uses question-driven tailoring to guide you through creating a comprehensive safety case adapted to your specific project context and ASIL level.
GSN is a standardized graphical notation for representing safety arguments. It shows how top-level safety goals are supported through sub-goals, strategies, context, and evidence. Our platform lets you build GSN diagrams and export them for use in safety assessments and audits.
The platform includes 25+ reusable argumentation patterns covering common safety case structures. These patterns provide proven templates for structuring arguments around hazard analysis, design verification, testing, and compliance - saving significant time compared to building from scratch.
Evidence mapping links your safety arguments to actual ISO 26262 work products such as HARA reports, verification results, and test reports. This creates full traceability between claims in your safety case and the evidence that supports them, which is essential for functional safety assessments.
Yes. Safety cases can be exported in GSN format for use in formal functional safety assessments and audits. The export includes the complete argument structure, evidence links, and ASIL-specific recommendations.

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Start building audit-ready safety cases with proven patterns and evidence mapping. Free plan available.

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