Pre-Shipment Quality Inspection: What Importers Must Know

What Is Pre-Shipment Inspection?

Pre-shipment inspection (PSI) is a quality check conducted at the supplier's facility after production is complete and before goods are loaded for export. An independent inspector verifies that the finished goods conform to your purchase order specifications, quality standards, and regulatory requirements.

For importers sourcing from China, PSI is the single most cost-effective risk mitigation tool available. Identifying a defect in Shenzhen costs a fraction of what it costs once the goods arrive at your warehouse in Frankfurt, Warsaw, or Almaty.

How PSI Works: The AQL Sampling Standard

Most professional inspections are conducted using the AQL (Acceptable Quality Limit) sampling methodology, defined in ISO 2859-1. Rather than inspecting every unit, inspectors pull a statistically representative sample and measure the defect rate against agreed thresholds.

AQL 0.65: Very tight. Used for critical defects (safety issues, functional failures). A batch of 1,000 units would require a sample of 80 with zero critical defects permitted.
AQL 2.5: Standard for major defects — items that render the product unsaleable or require customer return.
AQL 4.0: Acceptable for minor defects — cosmetic issues that do not affect function or safety.

The inspection result — Pass, Fail, or Conditional — determines whether you authorise shipment, hold the goods, or require rework before release.

What Inspectors Check

Quantity verification: Carton count and unit count match the packing list and purchase order.
Workmanship and appearance: Visual inspection for scratches, stains, assembly defects, colour variation.
Dimensional checks: Measuring key dimensions against engineering drawings or approved samples.
Functional testing: Operating the product to verify it performs as specified.
Packaging assessment: Packaging integrity, labelling accuracy (country of origin, CE marks, barcodes).
Material verification: Confirming materials match specifications — critical where substitution is common.

How to Brief Your Inspector Effectively

An inspection is only as good as the brief provided. Before each inspection, supply your inspector with approved product samples or annotated photos, a written inspection checklist, AQL levels for each defect class, specific tests to be performed, packaging and labelling requirements, and any known quality issues from previous orders.

Third-Party Inspection Companies

SGS: Largest global TIC company. Strong presence in all major Chinese manufacturing hubs.
Bureau Veritas: Particularly strong in consumer goods, retail, and industrial sectors.
Intertek: Broad coverage with strong technical testing capability.
QIMA: Technology-driven platform with rapid scheduling and digital reporting — frequently used by SME importers.

Standard PSI costs $250–450 per man-day. On a $15,000 order, that is a 1.7–3% insurance premium — worth every cent when a failed batch would cost $3,000–$5,000 in return shipping alone.

When PSI Is Non-Negotiable

First order from a new supplier
Products subject to CE, EAC, or other regulatory certifications
Orders where product safety affects end consumers
High-value shipments where rework or replacement carries significant cost
Suppliers with a history of defect on previous orders

Acting on Failed Inspections

A failed inspection is the system working as designed. Your options: require the supplier to sort and rework before re-inspection; negotiate a price reduction for goods accepted at reduced quality; or reject the shipment entirely if defects are structural. Document the outcome and use it in future supplier performance reviews.