Human-in-the-Loop(HITL)
Definition
A design pattern where a person reviews, approves, or corrects an AI system's outputs or actions before they take effect.In-Depth Explanation
Human-in-the-loop keeps a person in control of consequential decisions rather than letting an AI act fully autonomously. Common patterns include reviewing generated content, approving an agent's proposed action, or manually handling edge cases the model flags. It improves safety and accountability and is often legally required — for example, the EU AI Act mandates human oversight for high-risk systems. The trade-off is reduced automation and throughput.
Real-World Example
An AI agent drafts a refund but pauses for a support manager to approve it before any money actually moves.