How should a cold-chain parcel be tracked at a transfer hub?

A transfer point can add unobserved waiting and scan steps.

Define the lane

Before dispatch, record box ID, transfer lane, holding point and exception route.

Shift record

• Inbound scan
• Outbound scan
• Holding point
• Delay or wrong lane

Trace repeats. If a gap occurs at the hub, match the box's transfer path instead of extending last-mile time.