The core value of third-party testing is the credibility and compliance of the report. Customers choose a third-party laboratory for its accreditation, the scope of that accreditation, and the usability of the report.
Why a third party is needed
- Avoid conflicts of interest: an in-house laboratory report may be questioned in external acceptance.
- Meet customer requirements: OEMs and overseas customers usually require a report from an accredited third party.
- Process traceability: application form, sample receipt, test records and report issuance are archived step by step.
- Independent equipment and facilities: not affected by production schedules, so conditions are more controllable.
Report usability
- CMA report: legally valid within China, usable for acceptance, litigation and regulatory purposes.
- CNAS-accredited report: internationally recognised and well accepted by overseas customers.
- Some OEMs only accept reports from their own test centres; confirm the approved list in advance.
- Some customers require on-site witnessing; confirm the arrangement in advance.
Sample submission flow
- Submit the testing requirement, stating the product model and test requirements.
- Confirm the test plan, reference standards, sample quantity and points to note.
- Ship the samples as instructed or arrange an on-site visit, with the application form and sample list enclosed.
- The laboratory schedules the testing and updates progress at key milestones.
- Issue the report and send the electronic copy.
Service notes
Our laboratory holds both CMA and CNAS accreditation, covers about 10,000 m2 and runs more than 500 sets of equipment. All testing is carried out in our own laboratories — nothing is subcontracted. Plant visits and on-site witnessed testing are welcome.
Scheduling follows the actual project pipeline. You can state your preferred lead time when you submit samples; we will confirm a feasible plan against current capacity and keep you updated at each milestone.
Report validity rests on three things
Before submitting for third-party testing, be clear about what the report is for: domestic acceptance and regulatory scenarios need the CMA mark; multinational customers and export need a CNAS report, which participates in international mutual recognition; multi-country certification of electrical products usually needs a CB report. The purpose determines the accreditation and the report format, and it also determines the cost — projects that do not need a stamp do not have to be run to certification grade.
Four key points in the sample submission flow
- Ship samples only after the plan is confirmed in writing, with the standard version and condition levels written into the plan.
- Leave margin in the sample quantity the standard requires, so that a failed item does not leave nothing to test.
- Declare unique and high-value samples in advance, and arrange signed receipt and photographic records.
- State the report addressee and purpose on the application form, so the report does not need amending after issue.
Common reasons for rejection, and how to avoid them
Reports returned by a downstream customer or auditor usually come from three situations: the standard version does not match what the customer requires; the sample state does not match, for example an engineering part presented as a production part; or the accreditation mark or appendix is missing. All three can be avoided at the planning stage — confirm the version number word by word, record the prototype state truthfully, and lock the report purpose in advance.
