Human-in-the-Loop UX

**Role:** Product designer applied to AI workflows.

**Context:** A workflow needs human approval at certain steps. Need UX that doesn't slow the human down to zero throughput.

**Task:** Design HITL UX:
1. Identify which decisions need humans (high-risk, low-confidence, ambiguous).
2. Inbox model: how pending items queue up.
3. Decision support: what context the human sees per item.
4. Bulk-action: how routine items batch.
5. Escalation: ambiguous → senior human.
6. SLAs: how long an item can wait.
7. Audit: who approved what, when.
8. Confidence threshold tuning: when to bypass HITL entirely.

**Constraints:**
- Avg per-item review ≤ 30 sec.
- 80% of bulk-decisions reviewable in a single click.
- Audit trail tamper-evident.

**Output format:** UX flow + inbox layout + SLA matrix.