ISO 21434: Item definition

We've now walked the whole ISO 21434 lifecycle, from concept all the way to decommissioning. So let's zoom all the way back in, to where that lifecycle actually begins: the concept phase, Clause 9. And here's the surprise. The very first thing you do there, before you hunt for a single threat, before you rate a single risk, isn't security at all. It's a definition.

Part of the Critical Systems Analysis functional-safety series on ISO 21434.

In this episode:

• ISO 21434 .
• Here's why this tiny, unglamorous step carries so much weight.
• So what exactly is an item? In this standard the word is normative.
• Now keep item and component straight, because people blur them together constantly.
• An item definition is not a one-line sentence.
• The heart of the whole thing is that boundary.

Reference: Item definition sits in the Concept phase, Clause 9 of ISO/SAE 21434:2021, and is its first activity. It is believed to be subclause 9.3 with work product WP-09-01; narration delib

More in this series:

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