A factory audit report is the document a third-party inspection house produces after visiting a Chinese factory on your behalf. Costs run from $300 to $2,000 depending on depth. Quality varies even more than price.
What actually predicts field performance: the production line walk. The auditor should describe what they saw on the line, how many stations were operating, how many workers, and whether the line is genuinely running your order or a demo unit. If the auditor cannot tell, the audit is theater.
The traceability section matters too. A good factory can show you the cell lot, the BMS firmware version, and the test data for the specific batch you are buying. A bad factory will show you a generic ISO certificate and call it traceability. They are not the same.
The social compliance section is mostly theater for our buyers. We do not care about the factory's working hours policy; we care about whether the cells are genuine. If you are buying consumer electronics for European retail, social compliance matters. If you are sourcing solar panels for Lagos, it does not.
The financial stability section is genuinely useful. A factory that is two months from insolvency is a factory that will substitute cells or skip testing. If the auditor flags weak financials, find another supplier.
One more thing: ask the auditor to take photos of your specific production run, not generic factory shots. A good auditor will. A bad one will hand you a brochure.