Glossary · ISO/SAE 21434
Item Definition: ISO/SAE 21434 work product that scopes the system under cybersecurity analysis. The Item Definition fixes the boundary, operational environment, assumptions, and external interfaces of the item being analysed.
Where this matters: ISO/SAE 21434 Consulting
It is the foundation document that every later TARA artefact (assets, damage scenarios, threat scenarios) traces back to. Without a clean item definition, asset identification drifts and risk treatment becomes inconsistent.
Related terms
Threat Analysis and Risk Assessment — the structured cybersecurity risk method of ISO/SAE 21434.
Component, function, data flow, or property of an item whose compromise can cause harm.
Description of how the item achieves its cybersecurity goals at the architectural level.
Related pages
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