Skip to content
Shenzhen Makers深圳创客

Station 07 / 10

Quality control 品质

Factory audits, in-line and pre-shipment inspection, golden samples.
LeadOngoing
Next meetup
SZDIY open night (weekly)Details →

What happens at this stage

You check that what the factory makes matches what you approved. That can mean a factory audit (checking a supplier's capabilities before you commit), in-line inspection (checks during production) and pre-shipment inspection (checking a random sample of finished goods before you pay the balance and ship).

Why it matters

You're usually thousands of kilometres away. Independent checks catch problems while they can still be fixed, before goods are on a ship.

What it costs and how long

Third-party inspection is typically charged per inspector-day, often a few hundred dollars. Book a few days ahead.

Common mistakes

  • No written quality standard or golden sample (the approved reference unit) to inspect against
  • Paying the final balance before inspection
  • Only inspecting the first order

Who helps

QC and inspection firms, many with English-speaking staff. Filter the directory by QC & inspection.

Companies at this station

First Chinese testing and certification firm to list (ChiNext, 2009, 300012)

Shenzhen · Bao'an
Makes in-house
Testing & certificationQuality inspection & auditsTest & certification labQC & inspection
English-speaking salesSource ↗

Chinese Sourcing Agents

毅孜国际贸易
Foreign-owned

British-owned: UK contracting company plus a licensed Shenzhen entity

Shenzhen · Longgang
Partner network
Sourcing & project managementQuality inspection & auditsSourcing agentQC & inspection
Native-English project managerSource ↗

TESTCOO

测库

"Internet Plus Inspection": online booking since 2015

Shenzhen · Longgang
Quality inspection & auditsQC & inspection
English-speaking salesSource ↗
Foreign-managed

Prototype-to-production NPI management for foreign hardware teams, on site in Mandarin

Shenzhen
Partner networkPrototypesMass production
Sourcing & project managementQuality inspection & auditsElectronic component sourcingStartup NPI partner
Native-English project managerSource ↗
Foreign-managed

Began in 2003 as Seasonal Visions, a Halloween and Christmas décor supplier

Dongguan · Chang'an
Partner network
Sourcing & project managementProduct design & engineeringTesting & certificationQuality inspection & audits
English-speaking salesSource ↗
Foreign-managed

Founded by quality engineer Renaud Anjoran, author of QualityInspection.org

Hong Kong
In-house + partnersPrototypesLow volumeMass production
Contract manufacturing / box buildProduct design & engineeringTesting & certificationQuality inspection & audits
English-speaking salesSource ↗
Foreign-managed

Online booking of inspections, on site in China within 48 hours

Shenzhen · Luohu
Quality inspection & auditsTesting & certificationQC & inspectionTest & certification lab
English-speaking salesSource ↗
Foreign-managed

Founded in Taipei in 1984 by Colombian engineer Ed Sanchez

Shenzhen · Nanshan
Quality inspection & auditsSourcing & project managementQC & inspection
English-speaking salesSource ↗
Foreign-owned

New Zealand-owned sourcing agency in Luohu, Shenzhen

Shenzhen · Luohu
Partner network
Sourcing & project managementQuality inspection & auditsSourcing agentQC & inspection
English-speaking salesSource ↗

Engineer-founder with 15 years of factory QC and product development before starting it in 2012

Shenzhen · Nanshan
Partner networkPrototypesMass production
Sourcing & project managementQuality inspection & auditsSourcing agentQC & inspection
English-speaking salesSource ↗

Built for small overseas businesses and low-MOQ, multi-SKU orders

Shenzhen · Nanshan
Partner networkPrototypesLow volumeMass production
Sourcing & project managementQuality inspection & auditsSourcing agent
English-speaking salesSource ↗
Foreign-owned

Foreign-owned, foreign-managed factory (Sofeast group) with English-speaking staff in every department

Dongguan · Chang'an
Makes in-housePrototypesLow volumeMass production
Contract manufacturing / box buildPCB assembly (SMT/PCBA)Injection moldingSilicone & LSR molding
Native-English project managerSource ↗

Guides

01Design · 9 min

DFA and DFT: design for assembly and design for test, explained

How to design a product that's quick to put together and easy to test on a production line. The core design-for-assembly rules, what design for test means for circuit boards and finished products, and how Shenzhen factories use test fixtures.

02Design · 9 min

Engineering change orders (ECOs) and design freeze, explained

What design freeze means, why late changes are so expensive in hardware, and how engineering change requests, orders and notices (ECR, ECO, ECN) keep you and your factory on the same version.

03Basics · 12 min

EVT, DVT, PVT explained

The three test builds between a working prototype and mass production, explained for first-time founders. What each build is for, roughly how many units you make, and what usually goes wrong.

04Working in China · 10 min

How to choose a factory in China

A step-by-step, neutral guide for first-time hardware teams. How to find suppliers, tell factories from trading companies, check what you can, compare quotes, and start small.

05Design · 8 min

How to specify colour and finish

How to tell a factory exactly what colour, gloss and texture you want, using colour codes, physical samples, texture standards and a simple written spec. For first-time hardware teams.

06Choosing · 8 min

Packaging inserts for electronics: EVA foam, molded pulp, paperboard or plastic?

The main types of box inserts compared for hardware products. EVA and EPE foam, molded pulp, paperboard, plastic trays and anti-static foam, with tooling, cost drivers and Chinese supplier terms.

07Basics · 11 min

Product development stages: how to make a physical product from idea to finished product

The stages of making a physical product, from first sketch to boxes on a ship, explained for first-timers. What happens at each stage, why it matters, what you get out of it, and who in Shenzhen helps.

08Basics · 10 min

Prototype to production: what changes when you scale from 10 units to 1,000

Why a product that works as 10 prototypes can fail at 1,000 units, what changes in parts, people, testing, documents and cash as you scale, and the steps between a working prototype and your first production run in Shenzhen.

09Working in China · 10 min

Quality inspection explained: pre-shipment checks and AQL

What pre-shipment inspection is, when to inspect, how AQL sampling works in plain words, what an inspector checks, and how to prepare so the report is actually useful. For first-time importers.