An attractive catalog does not prove that a supplier can repeat the same frame quality. An audit follows the product from material storage to packed cartons and asks a question: can this factory make the approved product again, on schedule, with evidence?
For an importer or eyewear brand, that distinction matters.
An on-site visit is useful only when the questions are prepared. Before booking a flight, collect the supplier’s legal name. Record its registered address and business license. Compare those details with the quotation, contract and bank account.
Check whether the company is licensed for manufacturing. Some export companies present a polished sample room while production is handled elsewhere. Ask for the workshop address and any affiliated factory. A real eyewear factory should explain ownership and process boundaries.
Look at the product mix. Does the supplier make occhiali da sole, cornici ottiche or both? Can it work with acetate, stainless steel and injection materials? Review examples that resemble your target collection.
Send drawings and material requirements before the visit. Add target quantities and packaging expectations. Request a process flow, equipment list and sample inspection records. Vague answers tend to remain vague on the shop floor.
Pre-Audit Checklist
| Item | Documenti da richiedere |
| Business identity | Business license and factory address |
| Product capability | Similar samples and production records |
| Production process | Process flow and equipment list |
| Quality system | QC procedures and inspection reports |
| Compliance | Valid certificates and test reports |
Walk the route that a frame takes. Do not stay in the conference room with a slideshow. A production audit should connect engineering decisions to physical workstations.
Trace a current order from design review to prototyping. Follow it through tooling and frame forming. Continue to finishing, assembly and packing. At each stage, ask who owns the work and what record is created. Outsourced plating can work if the subcontractor is approved and inspected.
Pay attention to work-in-progress labels. In a well-run eyeglass factory, each tray shows a model code. It also shows color. Quantity and operation status are visible. An unlabeled tray of black frames can be mixed with a similar order.
Customization services exposes the difference between a manufacturer and a broker. Ask how the team handles a revised temple shape, a new logo position or a color between two samples. There should be controlled drawings, sample approvals and revision records.
Review how tooling changes are priced and approved. A capable partner will flag a weak hinge area before the mold is cut.
Check how acetate sheets and metal parts are received and stored. Review the same process for lenses, nose pads, hinges and coatings. Labels should include a code or batch reference. Pull one component from storage and match it against the approved bill of materials.
Quality is not a room at the end of the line. It is a series of decisions made before defects become difficult to repair.
Ask to see recent incoming inspection records. Check material thickness and color. Review hinge dimensions, lens clarity and plating condition. A supplier that accepts every component on arrival will sort more finished goods later.
Observe an operator during forming or assembly. Are frame dimensions checked with a gauge? Is hinge alignment tested before the temple is closed? These controls should be visible at the workstation.
Review the sampling plan and confirm how AQL levels are applied. Ask for the latest final inspection report. Testing may cover UV protection and hinge durability. It may also cover coating adhesion and nickel release. Check lens impact resistance and dimensional accuracy as required.
When a batch fails, what happens next? A useful corrective action report identifies the defect and cause. It records the containment step and responsible person. One factory found repeated logo misalignment caused by an outdated positioning jig. Replacing it solved more than retraining operators would have.
Monthly output figures are easy to print on a brochure. Actual capacity depends on bottlenecks. Ask how many lines are running. Check which processes are shared and how many shifts are planned. Compare the promised lead time with recent production records.
Capacity Verification Checklist
| Checkpoint | What to Verify |
| Production lines | Active lines for the required product type |
| Bottleneck process | Available capacity at the slowest operation |
| Current workload | Orders already scheduled for the same period |
| Labor plan | Skilled workers and shift arrangements |
| Lead time | Records from comparable completed orders |
| Subcontracting | External capacity and control method |
Traceability should work in both directions. Starting with a finished frame, the factory should identify the work order and component lots. It should also find the inspection result and shipment carton. Starting with a material batch, it should show which products used it.
Ask for a redacted traceability record. Paper forms can work if entries are complete and easy to retrieve. Larger production may use barcodes or ERP records. The technology matters less than response time. If a defect is reported Tuesday, can affected cartons be isolated Wednesday?
Review workplace safety and chemical handling. Check waste disposal and labor controls. Confirm that test reports support the destination market.
Use a simple scorecard so a confident sales presentation does not outweigh weak evidence.
| Audit Area | Peso | Key Evidence |
| Legal and Documentation | 15% | License, address and company records |
| Production Capability | 25% | Equipment, process flow and active orders |
| Quality Management | 25% | IQC, IPQC, FQC and CAPA records |
| Capacity and Delivery | 20% | Workload, bottlenecks and lead-time records |
| Traceability and Compliance | 15% | Batch records, test reports and certificates |
Record observations with photos or document references where permitted. Classify each issue as a pass or an observation. Mark minor and major nonconformities clearly. Set a corrective-action deadline before approving the supplier.
The lowest quotation rarely tells the whole story. Compare communication and engineering judgment. Check quality consistency and the ability to scale a sample into repeat production. Confirm MOQ and testing requirements in one specification. Add packaging, payment terms and delivery dates to the same document.
Looking for a verified eyewear factory in China?
Contatta SUSON to discuss your product specifications, target quantity and customization requirements.
Verify the legal entity and workshop address. Check equipment, active production and process records. Ask to see how a current order moves through the factory.
Ask about materials and MOQ. Clarify sample lead time and inspection standards. Cover testing, defect handling, subcontracting and traceability.
Yes. Confirm its ability to support design and prototyping. Check tooling, logo application, packaging and controlled engineering changes.
