AI Governance Engineer
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Human-on-the-loop (HOTL)

By Updated

The oversight mode in which a person can intervene in the design cycle and monitors the system's operation, rather than approving each decision 1. The system acts; people watch the signals and can stop it, so the stop path and the alerting are what must be tested.

Developed in
ch. 11, From definition element to registry field
Chapters
ch. 11, AI Defined
Contrast with
Human-in-the-loop (HITL) · Human-in-command (HIC)
Source
1 numbered reference, listed below

Commonly confused

  • Human-in-the-loop (HITL) versus Human-on-the-loop (HOTL)

    Human-in-the-loop (HITL)
    The oversight mode in which a person can intervene in every decision cycle of an AI system; in engineering terms, a gate that holds each consequential action until a named approver decides, logging…
    Human-on-the-loop (HOTL)
    The oversight mode in which a person can intervene in the design cycle and monitors the system's operation, rather than approving each decision.

    The differenceA person approves each consequential decision, against a person monitors and can stop the system.

    Why it mattersHITL is evidenced by approval logs and override rates; HOTL by alerting and a tested stop path.

Where it is used

3 chapters of the Body of Knowledge use the term. Each link opens the first section that does.

  • Adaptiveness

    The ability of an AI system to change its behaviour while in use, through learning after deployment; optional under the EU AI Act definition.

  • Intended purpose

    The use for which the provider intends an AI system, including its specific context and conditions of use.

Sources

  1. [1] Ethics Guidelines for Trustworthy AI (four ethical principles; seven requirements; human-in-the-loop, human-on-the-loop and human-in-command oversight). High-Level Expert Group on AI / European Commission. 2019-04-08. https://digital-strategy.ec.europa.eu/en/library/ethics-guidelines-trustworthy-ai (verified: primary)

Definitions of legal terms paraphrase the cited text, which governs. Dated statements are as of .

Cite this term

García Aibar, J. (2026). Human-on-the-loop (HOTL). In AI Governance Engineering: The Thesis & Body of Knowledge (v0.5.0), Glossary. https://doi.org/10.5281/zenodo.22956197. https://aigovernanceengineer.com/glossary/human-on-the-loop-hotl. CC BY 4.0

BibTeX

@misc{aige2026humanontheloophotl,
  author  = {Jorge García Aibar},
  title   = {{Human-on-the-loop (HOTL)}},
  note    = {Glossary, AI Governance Engineering: The Thesis \& Body of Knowledge, version 0.5.0},
  year    = {2026},
  doi     = {10.5281/zenodo.22956197},
  url     = {https://aigovernanceengineer.com/glossary/human-on-the-loop-hotl}
}