Step 2 of 13System

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02 · System definition

Understand the system

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Define the system before assessing it. A clear description exposes assumptions, unclear ownership and the points where AI output could affect someone’s opportunity.

Responsible AI

Use AI in a way that is safe, fair, explainable, accountable and respectful of people.

Trustworthy AI

Trust comes from evidence that the system is fit for purpose, tested, controlled, monitored and owned.

Fairness is not accuracy

An overall accuracy figure can hide much worse outcomes for particular candidate groups.

Capability

What does the system actually do?

Actors

Who provides, deploys and uses it?

Decision

How does output shape an outcome?

AI system description

Write in plain language. Separate known facts from assumptions.

System name

Business purpose

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Main users and AI actors

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Affected people

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AI capability and model type

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Data used

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Decision supported and human role

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Potential harms and assumptions

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Evidence and governance questions

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