Factory quality control - why is it essential?

Pre-shipment quality control identifies non-conformities while the goods are still with the manufacturer. It creates a decision point before balance payment and transport, but its value depends on a clear specification, appropriate sampling and product-specific tests.

The specification is the inspection baseline

An inspector should not have to guess what the buyer considers acceptable. Provide approved requirements, drawings, tolerances, colours, materials, reference photographs, markings and packaging instructions. An unclear criterion will produce an unclear inspection result.

Choose the right inspection stage

During-production inspection is useful when important features will later be hidden, the order is large or a late defect would require the whole batch to be remade. Pre-shipment inspection is normally carried out after production and when most goods are packed, but before final payment and carrier collection.

Typical pre-shipment checks

• model, colour, quantity and marking verification
• random selection from different cartons
• workmanship, dimensions and weight
• functional tests available at the factory
• labels, instructions and accessories
• retail packaging, export cartons and shipping marks
• photographic evidence of findings

AQL and sampling

An AQL sampling plan is often used for series-produced goods. It is not a 100% inspection and does not guarantee that every unit is defect-free. It defines how a sample is selected and the acceptance limits for agreed defect classes. Parameters should reflect the product risk and the consequence of each type of defect.

Critical, major and minor defects

Classification should be agreed before inspection. A critical defect may create a safety concern or prevent lawful use. A major defect affects function, durability or saleability. A minor defect is generally cosmetic and does not materially affect use. The same observation may have a different classification for a different product.

What follows a failed inspection?

Shipment should not be released solely on a supplier promise. The factory should identify the cause, affected quantity and corrective plan. A re-inspection after rework can focus on the known risks and confirm whether corrective action was effective.

A good inspection is not a casual visual check. It is a planned comparison against requirements, a documented result and reliable information for the importer's shipment decision.