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质检 · 9 guides

Quality control

The cheapest defect to fix is the one you catch before payment for the balance is released. These guides cover pre-shipment inspections, AQL sampling, third-party inspectors, and managing samples so what ships matches what you approved.

A worker beside a production work table in a factory

Quality control· 7 min

Pre-shipment inspection without flying to China

How to check that your goods are right before the balance is paid and the container ships, using a third-party inspector instead of a plane ticket.

A factory worker beside industrial equipment

Quality control· 6 min

AQL sampling explained for importers

AQL is how inspectors decide whether a batch passes without checking every unit. Here is what the numbers mean and how to set them for your goods.

A worker inspecting items beside factory equipment

Quality control· 7 min

How to handle a failed inspection with your supplier

A failed inspection is leverage, not a disaster, as long as you have not paid the balance yet. Here are your options and how to protect your money safely.

A wide view of machinery inside a manufacturing plant

Quality control· 8 min

What a factory audit covers and when you need one

A factory audit checks whether a supplier is real, capable and compliant before you commit real money. Here is what it covers and when it is worth paying.

A sample part being measured beside production machinery

Quality control· 6 min

The golden sample: locking quality before production

The golden sample is the agreed physical reference both sides build and inspect against. Here is how to approve one, seal it, and use it to settle disputes.

Finished goods stacked at the end of a production line

Quality control· 7 min

Common product defects and how to catch them

Most defects fall into a handful of predictable types by product category. Knowing them tells your inspector exactly where to look before you pay the balance.

An inspector examining goods inside a warehouse

Quality control· 8 min

Hiring a third-party inspection company in China

An independent inspector is your eyes inside the factory. Here is how to choose one, brief them properly, and keep their report genuinely independent.

Workers assembling parts on a factory line

Quality control· 6 min

During-production inspection (DUPRO) explained

A DUPRO checks your goods while the line is still running, so you catch a systematic fault on unit fifty rather than across every unit of the whole run.

A machine on a factory production line

Quality control· 7 min

How to write a product specification sheet

A clear spec sheet is what every sample, inspection and complaint gets measured against. Here is what to put in it and why vague specs cost you money.

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