The order shipped on time and the first container sold well. The problem appeared in month four, when a batch began failing at a rate the brand could not explain, and the factory could not produce a record linking the units to their component lots. The supplier was real, the factory existed and the price was competitive; what was missing was the verification that would have shown, before the order, that a defect investigation would be impossible. That is the failure this checklist is designed to prevent.
Charger manufacturer China: the five verification steps and what each one prevents
Five steps, five documents. Five steps, each producing a document rather than an impression.
Entity and site verification, a component change-control policy, certification reports that name the model, a capacity answer that includes test time, and a pilot order run at production rate. Together they cover the risks that a factory tour cannot: whose factory it is, what happens when a part is substituted, what the product is certified for, what the line can actually output, and whether the process holds at volume.
The order matters because the first three steps are documentary and can be completed in days, while the pilot consumes time and money. Running them in sequence means the pilot is only placed with a supplier who has already passed the checks that a pilot cannot reveal – traceability, change control and certification coverage.
Step 1: entity, site and product scope
Confirm the legal entity, the factory address and which products are built there.
Ask for the business licence, check that the address matches the site that will build the order, and ask whether the products you are buying are assembled there or purchased as finished modules. A supplier that assembles purchased modules is a legitimate business, but it changes where technical responsibility sits and which documents it can produce. The verification takes an hour and removes the most basic sourcing risk.
Step 2: the component change-control policy
Ask which components are treated as safety-critical, who approves an alternate, what testing it requires and how the customer is notified.
Chargers depend on controllers and power switches that are exposed to allocation and substitution. A written policy with a notification step protects the approved sample and the certification file; a verbal assurance that equivalents exist does not. This is the step that separates a supplier you can keep for years from one you will have to re-qualify after the first surprise.
Step 3: certification reports that name the model
Request the report files, not a summary, and check the model number against the quotation.
Certification is model and market specific. Wecent Group prepares certification groundwork for CE, FCC, RoHS, PSE and KC and confirms the current status per model. Check the issuing laboratory, the standard cited and the market covered; where a document is undated or refers to a sibling model, request the correct version before the order. Treat any market without a report as uncertified and plan the schedule accordingly.
Step 4: capacity calculated with test time included
Ask for the daily output with the functional test applied to every unit.
Assembly can be parallelised across benches; the test station has a fixed cycle time per unit and usually sets the line rate. A capacity figure quoted without the test cycle is optimistic, and the shortfall appears as a schedule slip rather than as a quality problem. Ask also which milestone converts an enquiry into planned production, and how many active programmes the line is supporting.
| Step | Evidence that passes | What the step prevents |
|---|---|---|
| Entity and site | Licence, address and product scope agree | Buying from a supplier that does not control production |
| Change control | Written policy with approval and notification | Silent substitution that voids the sample and certification |
| Certification | Report naming the model and markets | A customs or retail compliance query after shipment |
| Capacity | Daily output including the test cycle | A schedule slip discovered after the order |
| Pilot | Yield and defect categories reported | A process that works on ten units and drifts at scale |
Step 5: the pilot order
Run a pilot on the production line with the approved sample and require a report.
The report should state the quantity, the yield, the defect categories and the corrective actions taken. The pilot is also the moment to confirm that the line fixtures hold the specification at rate, because a process that works on ten units can drift over a thousand. Where a supplier cannot produce a pilot report, the first container becomes the pilot and the defects arrive with the product.
How to run the five steps efficiently
Send one consolidated request rather than a series of questions, and set a deadline for the response.
Ask for the licence and address confirmation, the change-control policy, the certification files for the quoted model, the capacity answer and a pilot quotation in a single message. Then arrange the visit or the live walkthrough around the pilot discussion, so the engineering questions and the documentary ones are handled in one cycle. A supplier who answers completely and on time is demonstrating the behaviour you will need during production.
FAQ
How long does supplier verification take?
The documentary steps can be completed in days if they are requested together. The pilot order depends on the production calendar and is usually scheduled after the documents have passed. The documentary steps take days if they are requested together, while the pilot depends on the production calendar and is scheduled after the documents have passed rather than in parallel with them.
Is a live walkthrough necessary?
A live walkthrough verifies the process and the records in a way documents cannot. Where travel is not possible, ask for a live session rather than an edited video, and combine it with the traceability exercise. Ask for a live session rather than an edited video where travel is not possible, and combine it with the traceability exercise on a real carton.
What if the supplier cannot provide a change-control policy?
Treat that as an unresolved risk. Without a policy, a substitution can occur between orders without notification, and the approved sample and certification file stop describing the product. Without a change-control policy a substitution can occur between orders without notification, and the approved sample and the certification file stop describing the product being shipped in the next container. Treat it as an unresolved risk until the policy exists.
Should we verify certification for every market we plan to sell in?
Yes. Certification is market specific, and a report for one market does not cover another. Plan the certification work for any market without a report before the label is printed. Certification is market specific and a report for one market does not cover another, so the work is planned for any market without a report before the label is printed.
Next step
Send the specification, the target markets and the expected volume to Wecent Group through the contact page. The reply provides the entity and site confirmation, the change-control policy, the certification position, the capacity answer and the pilot terms. Related reading: our charger factory, OEM/ODM manufacturing and quality control. External references: ISO 9001, IEC standards, EU CE marking, FCC equipment authorisation, GS1 standards and ICC Incoterms.
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