The level of oversight should match the use case and its consequences. These terms help teams make the operating model explicit:
Human in the loop
A person reviews or approves defined consequential actions before they proceed. This model is appropriate when a decision, action, or output needs a human decision at that point in the workflow.
Human on the loop
A designated owner supervises activity, reviews exceptions, and can intervene or stop the process. This model does not mean that the person approves every routine action.
Human accountable
The organization retains authority for its objectives, information, approvals, and risk decisions. Assigning a reviewer or supervisor does not transfer that accountability to a system or provider.
Testing, logging, and evidence
Establish practical tests, known limitations, review records, and change evidence that help the responsible team understand what the use case did and why.
Change and operating review
Reassess when the business purpose, users, information, connected systems, capability, risk, or operating conditions change. The next step may be to constrain, pause, revise, or retire the use case.