RoHS control in electronics factories often fails not because of a lack of measuring equipment, but because of a lack of control points in the right place. A shipment may have a good test report but still exceed the limit if the factory cannot control the replacement materials, the glue changes suppliers, or the soft plastic packaging is imported without declaration.
Below is a list of 20 control points, divided into three stages: input – production – output. This list is designed to be assigned to a specific person and reviewed periodically, not to be kept in a filing cabinet.
1. Why is it divided into three stages?
RoHS risks appear at three different times, and the handling measures at each time are also different:
- Input: The risk lies in the materials purchased — alloys, coatings, glues, plastics, welds, packaging. Control by material declaration and screening test.
- Production: Risk lies in non-design changes — changing suppliers, changing wire types, changing glue, mixing inventory, reusing packaging. Control by change process and material isolation area is not achieved.
- Output: The risk lies in attaching the wrong label, keeping the wrong records, and delivering the wrong configuration to the customer. Control by checking before delivery and linking records with product codes.
2. Seven checkpoints on the entry stage
| # | Control point | Evidence needed |
|---|---|---|
| 1 | Uniform material list for each approved product code | Material takeoff table has version and approver |
| 2 | The supplier has signed a material declaration according to the restricted substances list | The declaration form has the effective date and material code |
| 3 | High-risk materials have been tested for screening | XRF results or test reports for welds, coatings, soft plastics |
| 4 | New suppliers are evaluated before going into production | Supplier evaluation form with material samples |
| 5 | Imported materials are compared with product codes before being warehoused | Minutes of input check |
| 6 | The material isolation area has not been met or has insufficient records | Warehouse diagram with quarantine area marked |
| 7 | There is a process to handle when the supplier changes the material formulation | Change notification commitment, notification form |
3. Six control points in production
| # | Control point | Something that’s easy to overlook |
|---|---|---|
| 8 | Any changes to materials, suppliers, or adhesives must go through the change process | Changing adhesives is often considered a “minor change” but has a direct impact on phthalates and solvents |
| 9 | Replacement materials must be declared before use | Try a small batch before applying for paperwork |
| 10 | The line uses the correct approved materials for the product code | Mixing materials of two product codes in different markets |
| 11 | Tools, trays, and molds are controlled for cross-contamination | Use the same tray between lead and non-lead materials |
| 12 | Packaging and auxiliary materials (glue, ink, stamps) are included in the evaluation list | Soft plastic packaging is often excluded from the catalog because it is not a product detail |
| 13 | Have periodic testing of running product samples, not just initial samples | Only try once when modeling, then don’t try again |
4. Seven control points on the output leg
| # | Control point | Evidence needed |
|---|---|---|
| 14 | Regulation conformity documents are attached to the correct product code delivered | Declaration of conformity and test report according to product code |
| 15 | The correct product label has been checked | Photos of actual labels on goods, label inspection records |
| 16 | Full documentation and manufacturer information | Instructions, manufacturer/importer information |
| 17 | There are samples stored in batches with clear retention periods | Book to monitor stored samples and storage conditions |
| 18 | There is a re-checking process when customers request additional documents | Feedback form, responsible contact |
| 19 | There is a handling process when it is discovered that delivered goods are not satisfactory | Recall process, customer notification form |
| 20 | Records are periodically reviewed according to the supply chain’s changing cycle | Review schedule and review minutes signed by someone |
5. How to turn a checklist into a working system
A 20-point category is only valuable when tied to people and calendars. Three implementation principles:
- Each point has a responsible person. Do not write the name of the department, the name of the person and the title.
- Each point has specific evidence. If documents cannot be shown, that point has not really been controlled.
- Each point has a testing frequency. Input points are checked according to imported batches; production points checked by shift or by change; Output points are checked according to the output batch.
6. Frequently asked questions
Does a small factory need 20 points?
Can be deployed in stages: starting with points 1, 2, 3 (list of materials, declaration, screening test) and points 14, 15, 17 (records, labels, stored samples). This is the group of points that block most of the risks.
Does this checklist replace the test report?
No. The checklist is a preventative system, and the test report is evidence for a moment. The two things complement each other: the test report proves that the sample has been tested, the checklist proves that the mass-produced product stays true to the sample.
What if the supplier refuses to sign the declaration?
This should be considered a supplier-level risk: switch to periodic testing for that material, or find an alternative source. For high-risk materials such as welds, coatings, and soft plastics, failure to declare is a gap that cannot be filled by reporting another batch.
How often should records be reviewed?
At least once a year, and as soon as there are changes in suppliers, materials, structures or when customers change requirements. Legal milestones in export markets are also a natural opportunity for review.
7. Conclusion
Effective RoHS control does not lie in an expensive test room, but in a system of control points with accountable people and evidence. The twenty points mentioned above are broken down to make it easy to deploy, easy to test, and easy to demonstrate to customers.
If you only choose to do three things in the next quarter, choose: finalize a uniform material list for key product codes; Require all suppliers of high-risk materials to sign declarations; and establishing a quarantine area for materials with insufficient records. These three things prevent more risk than any single test.
References
- Directive 2011/65/EU and its amendments (limits based on homogeneous materials, compliance obligations).
- Standard on conformity assessment documents for electrical and electronic equipment (EN IEC 63000).
- IEC 62321 test method series and corresponding method standards.
- European Commission guidance on manufacturers’ and importers’ obligations under RoHS.
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Disclaimer
This article is an interpretive content compiled by us; not legal advice. Enterprises need to compare relevant documents/standards verbatim before applying them to specific products.
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