Why a Pre-Shipment Inspection Is Your Last Line of Defence

Your order is finished. The factory says everything is perfect. The cartons are packed and the shipment is ready to go. This is the moment when many NZ importers breathe a sigh of relief and wait for the container to arrive. It is also the moment when every undetected quality problem becomes significantly more expensive to deal with.

A pre-shipment inspection (PSI or final random inspection) is a physical check of your finished goods at the factory before they are loaded for export. It is conducted when production is 100% complete and at least 80% of the order is packed. What the inspector finds either confirms your order is ready to ship, or gives you documented evidence to hold the factory accountable before it is too late.

When to Book a Pre-Shipment Inspection

Book when the factory confirms production is complete and at least 80% of the order is finished and packed into export cartons. Inspecting before this threshold means the inspector cannot draw a representative sample from the full order. Build the inspection into your timeline — a failed inspection followed by factory repairs adds days or weeks, and rebooking freight costs money. Book at least 3 to 5 working days before you need results. Inspection slots in Chinese manufacturing hubs fill quickly before Golden Week and Chinese New Year.

How Inspectors Select Units to Check: AQL Sampling

Inspectors use AQL (Acceptable Quality Level) sampling, a statistically defined methodology that defines the maximum defects per hundred units you are willing to accept. AQL 2.5 is standard for general consumer goods — you accept up to 2.5 defective units per 100 in the sample. For higher-risk products like children's goods or electronics, AQL 1.0 is appropriate.

Based on order quantity and AQL level, sampling tables from ISO 2859-1 determine how many units to check. For 3,000 units at AQL 2.5, the inspector checks 125 units. The inspection passes if no more than 7 have major defects; it fails if 8 or more are found. Defects are classified as critical (safety risk, zero-tolerance threshold), major (unacceptable to most customers), or minor (small imperfections most customers would notice but not return).

What the Inspector Physically Checks

Quantity Verification

The inspector counts cartons and verifies the total matches your order and packing list. Quantity discrepancies at shipment — including short-shipped orders — are surprisingly common and far easier to resolve before the container is sealed.

Product Specification Checks

Physical samples are compared against your approved sample, tech pack, and specification. This covers dimensions against your spec sheet, materials and components against the BOM, colour accuracy against Pantone references, print or embroidery accuracy, and functional features.

Workmanship and Appearance

Each sampled unit is inspected for defects. For apparel: seam consistency, stitch density, fabric defects, embellishment security, label placement. For hard goods: surface finish, assembly integrity, moving parts functionality, visible manufacturing defects. Defects are photographed and classified.

Labelling and Marking

Labels are checked for content accuracy, language, regulatory compliance, placement, and legibility. For NZ goods this includes care label content and symbol accuracy for textiles, country of origin statement, required safety warnings, and compliance markings. Label errors are among the most common inspection findings and create compliance risk under the Fair Trading Act.

Packaging and Carton Checks

Outer carton markings are verified against your shipping marks spec. Carton dimensions, weight, and construction quality are checked. The inspector looks for carton damage and verifies inner packing protects the product adequately.

On-Site Functional and Safety Tests

Depending on category, the inspector may conduct on-site tests: button pull tests for children's apparel, zipper function, power-on tests for electronics, basic waterproofing checks. These are not laboratory tests and cannot replace formal certification testing, but they catch obvious failures before shipment.

Understanding Your Inspection Report

A professional inspection company provides a written report within 24 hours including a clear pass or fail result, full defect list with photographs, breakdown by classification, measurement results, and general observations. A pass means the order met your AQL threshold — not that it is defect-free. A fail means the defect rate exceeded your threshold and you need to decide what happens next.

What to Do When an Inspection Fails

A failed inspection means you have documented evidence of a problem and a decision to make. If defects are correctable and the factory has time before your cargo deadline, require them to sort, repair, or replace defective units and arrange a re-inspection at their cost. Get commitments in writing. If defects are widespread and systemic, you may need to negotiate partial shipment, a price reduction, or a full remake. If defects are critical — safety issues, compliance failures, or material substitution fraud — you may need to refuse the shipment entirely.

Arranging a Pre-Shipment Inspection From New Zealand

International inspection companies like QIMA, Bureau Veritas, SGS, and Intertek operate across Chinese manufacturing regions. A standard one-day inspection typically costs USD $200 to $350. You provide your product specifications, AQL requirements, and checklist; they handle the rest.

Working through a sourcing agent integrates inspection with the broader supply chain. At Epic Sourcing, we coordinate pre-shipment inspections for NZ clients, brief inspectors on product specifications, review the report with you, and handle factory negotiation in Mandarin if there is a problem. If you have an order in production in China and want to arrange an inspection, get in touch with the Epic Sourcing team.