# Concepts

> The ideas behind Vigilbase OS - the environment model, investigations, approvals and verification.

Source: https://docs.vigilbase.com/os/concepts

Vigilbase OS is built around one loop: observe your environment, investigate what looks wrong, propose an exact fix, wait for a person to approve it, execute it and verify the result. These pages explain each part.

:::cards
- [Environment model and Security Fabric](https://docs.vigilbase.com/os/concepts/environment-model) How Vigilbase builds one evidence-backed model of your organisation.
- [Investigations](https://docs.vigilbase.com/os/concepts/investigations) How findings become cases with evidence, hypotheses and outcomes.
- [Approvals and policy](https://docs.vigilbase.com/os/concepts/approvals-and-policy) Who may approve what, and what Vigil may do on its own.
- [Verification](https://docs.vigilbase.com/os/concepts/verification) How Vigilbase checks that an approved change worked.
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