A factory audit answers one question: can the business you are contracting with actually produce the back massager you sampled, at your quantity, with documents that cover it? Back massagers raise the audit bar in three places: higher-power electrical systems (WY-C43 runs at 60 W), larger structures with more assembly steps, and heavy cartons whose packaging must survive freight — 2.5 kg to 10.8 kg gross per unit.
Use this checklist to organize company information alongside product documents, so the contracting business, factory and product can be identified clearly.
Company and business identity
| Check | Questions to ask | Documents to request |
|---|---|---|
| Contracting entity | Is the seller the manufacturer, or a trading company acting for a factory? | Business license; factory address matching the license |
| Manufacturing role | Which processes are in-house — foam, frame, sewing, assembly, testing? | Production flow description; outsourced-process list |
| Export experience | Which markets has this category shipped to? | Export record or references for cushions and mattresses |
| Responsibility | Who signs the specification and handles claims? | Named contact with authority over quality decisions |
Product documents mapped to the exact model
A document covering a different massager is not sufficient evidence for your model. For each document, check the model list, date and test scope.
- Electrical safety and EMC documents for the exact model and rated power — WY-C43 at 60 W and WY-CD8-F at 12 V sit above handheld power levels, and the test scope should reflect that.
- Vehicle-power documentation for WY-C43: evidence covering DC 12 V operation and the supplied accessories.
- Heating documentation: the measurement method and tolerance behind WY-C43's listed 45°C ± 2° plate and WY-CD8-F's three-level hot compress.
- Model-mapping record: How does the certificate file's model list map to the exact configuration you will order, including adapters for your market?
Production and process controls
- Lines for this product type: Confirm the cushion and mattress lines you see are the ones that will produce your order — structure sizes differ sharply across the range.
- Frame and foam processes: How are frames, foam and heating plates checked before assembly?
- In-process checks: Where are units tested — heating plate assembly, electrical assembly, final function test?
- Final inspection: Sampling plan per batch; treatment of failed units; functional test coverage for all nine modes on mattress models.
- Packaging line: How are heavy cartons packed, sealed and palletized? Ask about drop and vibration test practice for packed units.
Questions that expose specification drift
1. Show me the sample you would ship against my approved sample — is it from current production?
2. Which document covers this exact configuration, power system and adapter for my market?
3. If I change the fabric, manual or packaging, which parts of the certificate file remain applicable?
4. What is your process when a batch fails final inspection?
5. Who owns the tooling, and what happens on re-orders after two years?
After the audit
Record findings against this checklist, separate blocking observations from monitoring items, and agree corrective actions with dates. Keep the audit record with the approved sample and the written specification — the three documents together define what "the same product" means on re-orders.
Common audit questions
Can I audit before the first order?
Yes — audits are most valuable before contracting. Ask for the document set first, then decide whether an on-site or third-party visit is needed.
What if certificates cover a family of models?
Check that your exact model and configuration appear on the scope. If only the family is listed, ask for a document that names your model.
Do higher-power models need extra attention?
Yes — 60 W vehicle-powered units should show test evidence covering the DC 12 V input path and the heating system specifically.
Start your supplier review with Relanovo
Request the document set for the back massager model you intend to order, together with a sample and quotation. We support buyer audits with factory information and model-matched documentation.