Lead Time
The time from order confirmation until goods are ready or delivered, usually split into production lead time and shipping transit time.
TL;DR: Lead time is how long it takes from confirming an order until the goods are ready to ship or delivered. Always check whether a quoted lead time covers production only or the full journey to your site.
Buyers often mix up three different numbers. Production lead time is the time the factory needs to make and pack the goods. Shipping transit time is the time the goods spend moving from origin to destination, including port handling and customs clearance. Total lead time is the sum of both, plus any waiting time for booking, inspection, or document release.
For custom products, production lead time usually starts only after all inputs are final. This typically means the design or drawing is approved, samples such as a PPS (Pre-Production Sample) are confirmed, and the deposit is received. Changes made after approval often restart or extend the schedule.
Transit time depends heavily on mode and route. Sea Freight takes weeks, Air Freight takes days, and Express Courier Shipping is often the fastest for small parcels. Transshipment, port congestion, and holidays can add time.
When importing from China, plan around Chinese New Year. Many factories and logistics services slow down or close for several weeks around the holiday, and freight demand spikes before it. For project work such as custom mosaic murals, work backward from your installation date and build in a buffer for approvals, inspection, and customs.