Shipping lead time is the elapsed time between a defined shipment start and endpoint. The clock might run from cargo availability, carrier pickup or departure to port arrival, warehouse receipt or final delivery, so the two events and calendar basis must be stated.
How is shipping lead time calculated?
A basic calculation is shipping lead time = endpoint date and time − start date and time, adjusted only for any clearly stated calendar convention.
Illustrative shipping lead-time calculation
| Event | Date | Elapsed time |
|---|---|---|
| Carrier pickup | 3 June | Start event |
| Delivered to warehouse | 18 June | End event |
| Shipping lead time | 15 calendar days | 18 June − 3 June |
The illustrative result covers pickup through warehouse delivery. It does not include production before pickup or receiving work after delivery.
Which stages can be included?
Depending on the measure, it may include origin handling, main transport, transshipment, customs clearance, destination handling and final delivery.
What causes variation?
Booking availability, cutoffs, port or terminal congestion, weather, customs holds, transshipment connections and delivery appointments can move the actual result.
How should buyers compare quotes?
Use the same start, endpoint, mode, lane and calendar basis. Separate carrier transit estimates from total door-to-door planning time and record assumptions.
