Human in the Loop
Human-in-the-loop design keeps a person responsible for review, approval or escalation at defined points in an automated or AI-assisted workflow.
Also called: HITL, human review, human approval
Definition
Human-in-the-loop means the system pauses, routes or exposes work to a person at a defined control point instead of treating automation as fully autonomous.
Why it matters to the business
Human review can preserve accountability where context, policy, judgment or error cost makes unattended execution inappropriate.
How it works
The workflow defines which outputs can continue automatically and which must be reviewed, approved, corrected or escalated.
Where it appears in real systems
Examples include approving customer-facing AI drafts, reviewing low-confidence classifications or authorizing a consequential action.
Common failure modes
- Review queues become bottlenecks.
- The workflow does not preserve enough context for a reviewer.
- Approval rules are vague.
- People bypass the control because it is too cumbersome.
Implementation considerations
- Define the approval trigger.
- Show reviewers the relevant evidence.
- Record decisions where auditability matters.
- Provide fallback and escalation paths.
When it is appropriate
Use human review when the workflow benefits from automation but cannot safely or responsibly run every decision unattended.
When it is not appropriate
Do not add manual approval to low-risk deterministic steps when it only recreates the bottleneck the implementation is meant to remove.
Relationship to BYFORCE
AI Workflow Production includes human controls where the use case requires them.