# Sector extensions

Sector extensions are overlays on the [universal process](../../docs/universal-process.md), not alternative methods. Apply the organization track first, then add the relevant sector gates.

| Sector | Decisive boundary | Extension |
|---|---|---|
| Healthcare | Clinical purpose, patient safety, and product qualification | [Healthcare](healthcare.md) |
| Education | Pedagogical legitimacy, learner rights, and equitable access | [Education](education.md) |
| Finance | Materiality, model risk, customer impact, and operational resilience | [Finance](finance.md) |
| Critical infrastructure | Essential-service continuity, safety boundaries, and incident command | [Critical infrastructure](critical-infrastructure.md) |

The same system may require more than one extension. A hospital, for example, may need both the healthcare and critical-infrastructure gates.