---
title: "Human in the loop | Glossary"
description: Human in the loop means a named person holds an authority ceiling and a review gate. It is not a human glancing at a dashboard. The human charters the work…
image: "https://lenvanderhof.com/photos/len-portrait-1.jpg"
---

Term

# Human in the loop

Human in the loop means a named person holds an authority ceiling and a review gate. It is not a human glancing at a dashboard. The human charters the work, can stop a tool call, and owns the outcome. If no one can fail the output against written criteria, the loop is decorative. A vendor slide that says HITL without a named reviewer is a slogan. The name, the ceiling, and the fail criteria have to live in the runbook, not in the deck.

## When to use it

Use it when a vendor slide says “HITL” and the runbook has no named reviewer. If the output can ship while that person is offline, the loop is already broken.

## Do not confuse with

Not a dashboard watcher and not a weekly steering committee. The loop is a named person who can fail the output against written criteria before it leaves the building.

## Essays on this site

- [What is an AI agent?](https://lenvanderhof.com/en/blog/what-is-an-ai-agent/)
- [Why multi-agent systems fail](https://lenvanderhof.com/en/blog/why-multi-agent-systems-fail/)
- [An agentic workflow is not an automation](https://lenvanderhof.com/en/blog/agentic-workflow-vs-automation/)
- [Human in the loop meaning: a named person who can fail the work](https://lenvanderhof.com/en/blog/human-in-the-loop-meaning/)
- [AI agent or chatbot: three tests before you mix the words](https://lenvanderhof.com/en/blog/ai-agent-or-chatbot/)

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