Direct answer
Enterprise expense workflows auto-approve small claims under threshold, route standard claims to managers, escalate high-value claims to directors, and log every decision with timestamp, approver identity, and IP for audit.
Typical enterprise expense approval flow:
1. Employee submits claim on mobile with receipt
2. System validates category limits (personal → band → category → global)
3. Under threshold → **auto-approve**
4. Standard amount → **manager approval**
5. High value → **director or multi-level chain**
6. Every action logged in **approval_history** with IP and user agent