Lead time
How to check whether a supplier can meet the promised lead time
How buyers can validate China supplier lead time promises by checking capacity, material availability, sample approval dependency, deposit timing, milestone evidence, delay signals, and escalation triggers.
A promised lead time is only useful when the supplier can explain what must happen before the cargo is ready. Buyers should test the schedule before deposit, not after the shipment date starts slipping.
Ask what the lead time depends on
Do not accept only “30 days production” or “can ship fast.” Ask what starts the clock: deposit receipt, sample approval, artwork approval, material arrival, tooling completion, or production slot confirmation.
If the supplier gives one lead time but several inputs are still open, the date is not reliable yet.
Check capacity and materials
Ask whether the production line is available, whether materials are in stock, what components have long lead times, and whether packaging materials need separate purchase or printing.
Reliability questions
- When can production start if deposit is paid this week?
- Which materials are already available?
- Which parts depend on subcontractors?
- What factory capacity is reserved for this order?
- What other approvals can delay production?
- What date can goods be ready for inspection?
Reliable suppliers can answer with milestones and evidence. Weak answers usually stay vague.
Review schedule evidence
Ask for a milestone plan covering material purchase, pre-production sample, production start, mid-production update, packing start, inspection readiness, and shipment handover. The plan should include dates and evidence.
Use this with the production milestones checklist and production follow-up checklist.
Watch delay signals
Delay signals include changing explanations, no material evidence, no production photos, late packaging approval, no finished quantity updates, repeated “almost finished” messages, and pressure for balance payment before inspection readiness.
If these appear, ask for a recovery plan, revised date, and evidence. If timing is critical, start backup supplier review before the date fails.