Direct answer
How do you verify a Chinese supplier's production capacity?
Check capacity against your specific product, quantity and delivery window. Compare the proposed production schedule with recent output records, existing commitments and the availability of materials, tooling and trained operators. A machine list or monthly capacity figure is not enough.
- Which process limits the number of acceptable units the factory can finish?
- How much time at that process is available after other orders and planned downtime?
- What evidence supports the output rate and the promised ready-to-ship date?
Record the assumptions, gaps and next check. Capacity reviewed today is not a guarantee that the same production slot will remain available later.
1. Define the order before asking about capacity
For a U.S. distributor or OEM buyer, the useful question is not how many units a factory can make each month. It is whether the proposed line can deliver your mix of products, at the required specification, within the agreed window.
- Identify each product and drawing revision, order quantity, batch size and expected repeat demand.
- Separate sample approval, material readiness, production completion and shipment handoff dates. A factory-ready date is not a U.S. arrival date.
- Identify special tooling, finishing, inspection and packaging requirements that consume time beyond the main production operation.
2. Ask for evidence tied to the proposed production route
Agree the disclosure scope before requesting records. Redacted schedules can show committed hours and available slots without exposing another customer's identity. A refusal to share confidential details is not proof of insufficient capacity; record what remains unverified and agree an alternative check.
Scroll the table sideways to compare all columns.
| Check | Evidence to request | Question it answers |
|---|---|---|
| Recent output | Dated run records for a comparable product, including run time and accepted quantity. | Does the claimed rate reflect routine production rather than a brief demonstration? |
| Existing workload | A redacted schedule covering the relevant machines and delivery window. | Is time actually available for this order? |
| Critical equipment and people | Assigned machine, tooling and operator availability, including planned maintenance. | Does the plan depend on a resource that is not yet ready? |
| Materials | Material identity, available quantity and confirmed dates for shortages. | Can the scheduled run start with the approved inputs? |
| Outside processing | Named process and location, booked slot and return date. | Does a subcontractor determine the delivery date? |
| Inspection and packing | Time and resources allocated for checks, corrections, labeling and pack-out. | Does the finish date mean accepted, packed goods or only completed machining? |
3. Check the bottleneck, not the fastest machine
Walk through the full route. A fast cutting operation does not establish shipment capacity if finishing, assembly or final inspection cannot keep up. Ask the supplier to identify the limiting operation and explain how it calculated the time available for your order.
- Use a rate from a comparable material, tooling and specification; explain any difference from your proposed job.
- Distinguish one shift from overtime or an additional shift that has not yet been staffed.
- Do not subtract the same loss twice. Ask whether a quoted output rate already includes stops, changeovers or rejected units.
4. Keep a short capacity decision record
RISVO suggests recording the conclusion against one identified order. This keeps a broad statement such as capacity confirmed from becoming approval for any quantity, product or delivery date.
- Scope: supplier entity, production location, product revision, quantity and delivery window.
- Basis: limiting operation, available time, output-rate evidence and the date those records were reviewed.
- Dependencies: material arrivals, tooling, staffing, outside processes and any unreserved production slot.
- Decision: proceed within the reviewed scope, run a limited production trial, request more evidence or hold the order.
- Follow-up: responsible person, due date and changes that require a new capacity review.
5. Recheck the schedule when the order becomes real
Reconfirm the production slot after sample approval and before the agreed production release. If quantity, product mix or timing changes, ask the supplier to update the plan. During production, compare accepted output with the milestone schedule rather than relying only on photos of busy machines.
- Check whether materials and tooling arrived when planned and whether production started at the agreed location.
- Track accepted quantity at the limiting operation and any backlog building before the next step.
- Record proposed overtime, subcontracting or process changes before using them to recover a delay.
Reference and scope
NIST's Manufacturing Innovation Blog recommends considering supplier capacity, staff flexibility and equipment maintenance during supplier selection. The order-specific checklist and calculation above are RISVO's suggested review approach, not a NIST standard or an account of a customer project.
Practical answers
Frequently asked questions
- Does an approved sample prove a factory can handle the order volume?
- No. A sample supports a decision about the product evaluated. Volume production also depends on the available equipment, material supply, staffing, outside processes and time allocated to the order.
- Can capacity be checked remotely?
- Schedules, run records and live video can support an initial review. If the output rate, equipment assignment or production location remains unclear, agree a targeted visit or witnessed trial. Keep remote findings limited to the evidence reviewed.
- Is there one safe factory utilization percentage?
- No single percentage answers an order-specific question. A factory-wide average can hide a fully booked critical machine. Review workload at the operations needed for your product and the time available in your delivery window.
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