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Factory Audits and QC Staffing at Chinese CNC Suppliers

What the SGS, TÜV Rheinland, BV, and CTI audit badges on Chinese supplier profiles cover, and how many QC inspectors and employees 595 machining suppliers report.

Short answer 86% of the supplier profiles CNC Compass read carry an on-site audit by a named inspection company (SGS, TÜV Rheinland, BV, or CTI). Half of the 275 suppliers that report QC staff have one or two inspectors; 13% have ten or more. Use the audit as a check on the company and site, and ask how your parts will be inspected.
Decision factorRecommendationNotes
Audit badge on the profileRead the audit report the marketplace links to508 of 593 profiles name SGS, TÜV Rheinland, BV, or CTI.
Tight tolerances or many critical featuresAsk how many QC inspectors work per shift and what equipment they useThe median supplier reports 2 QC inspectors.
Inspection records neededSpecify the report (dimensional, FAI, material certificate) in the purchase orderFew suppliers publish which reports they provide.

Audit badges

Of the 593 Made-in-China.com profiles CNC Compass read, 508 (86%) name the inspection company that audited the supplier on site: SGS (204), TÜV Rheinland (141), Bureau Veritas (112), and CTI (51). The audit checks the company behind the profile, such as registration, premises, and staff. It does not test parts or certify a process, so it complements, rather than replaces, your own first-article inspection.

QC inspectors and headcount

275 suppliers report how many QA/QC inspectors they employ. The median is 2; 138 (50%) report one or two, and 36 (13%) report ten or more. Across the 274 suppliers that report total headcount, the median is 40 employees.

QA/QC inspectorsSuppliers (of 275)
1–2138 (50%)
3–9101 (37%)
10 or more36 (13%)

Anhui Dongou Machinery Technology, for example, reports 9 QC inspectors among 67 employees, and its profile was audited by SGS.

What to ask

A small QC team can be enough for simple parts in small batches. For tight tolerances, many critical features, or large batches, ask who measures your parts, with which equipment, at which stage (first piece, in process, final), and which report you will receive. Put the report you need, for example a dimensional report on the first article and a material certificate, into the purchase order.

How these figures were counted

CNC Compass reads each listed supplier’s Made-in-China.com company profile and keeps every answer with its quote and page address. The figures above cover the 595 supplier records published on this site, read on 2026-10-05. They describe this catalogue, which is mostly suppliers of machined and fabricated parts found on that marketplace; they are not a census of Chinese manufacturing. Each supplier record on this site shows the same answers with a link to the page they come from.

Frequently asked questions

What does an SGS or TÜV audit on Made-in-China.com mean?
The inspection company visited the supplier and checked the company information on its profile, such as registration, premises, and staff. It is not a certificate for a product or for your part.
How many QC inspectors does a typical Chinese CNC supplier have?
Of 275 suppliers in the CNC Compass catalogue that report it, the median is 2. 138 (50%) report one or two inspectors and 36 (13%) ten or more. The median reported headcount is 40 employees.

Sources

  1. Anhui Dongou Machinery Technology: QA/QC inspectors , Made-in-China.com supplier profile Checked 2026-10-05
  2. Cangzhou Yifeng Hardware Manufacturing: QA/QC inspectors , Made-in-China.com supplier profile Checked 2026-10-05
  3. Audited Supplier, for buyers , Made-in-China.com Checked 2026-10-07
  4. Figures: CNC Compass fact store, guide statistics of 2026-10-07 , CNC Compass Checked 2026-10-07

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Editorial guidance should be checked against its cited first-party sources before publication. Updated 2026-10-07.