Pre-Shipment Inspection Guide

A pre-shipment inspection report lands in your inbox the week before a container is due to leave, and it is the last chance to catch a problem before you pay for it. This guide covers pre-shipment inspection in China and the wider Asia sourcing region from the buyer's side: what a PSI actually is, how it differs from the other inspection types in the production cycle, when to trigger one, how AQL sampling under ISO 2859-1 really works, how defects are classified, what happens on the inspection day, how to brief the inspector, what a good report contains, and the red flags to catch when you read one. For AQF's pre-shipment inspection service, see the service page.

1. What Is a Pre-Shipment Inspection?

A pre-shipment inspection (PSI), also called a final random inspection (FRI) in most Western sourcing contexts, is an independent quality control check conducted by a third-party inspector at the factory site when 80 to 100 per cent of the production order is complete and packed for export. Whether you are running a pre-shipment inspection in China, Vietnam or elsewhere in Asia, the check verifies that the finished goods match the buyer's purchase order specifications, quantity, workmanship, function, dimensions, packaging and labelling, before payment is released and before the goods leave the factory.

A PSI is not a customs procedure, not a lab test, and not a factory audit. It is a batch-level inspection of finished goods, sitting at the end of the production cycle rather than at the start.

On vocabulary: some quality control firms use FRI more narrowly for the last inspection in a series of DUPRO checks. In most Western third-party inspection providers' terminology, including AQF's, PSI and FRI describe the same inspection at 80 to 100 per cent production completion, and this guide uses PSI throughout.

On legal context: the World Trade Organization Agreement on Preshipment Inspection (1994) governs mandatory PSI regimes operated by some governments for customs valuation purposes. For ordinary B2B commercial trade, a PSI is buyer-driven, not a regulatory requirement.

AQF holds ISO/IEC 17020 accreditation for its inspection body activities, providing an internationally recognised framework for the impartiality and technical competence of the on-site inspection process.

2. Pre-Shipment Inspection in the Wider QC Workflow (PPI vs DUPRO vs PSI vs Container Loading)

PSI is one of four inspection types available across the production cycle. Choosing the right one at the right moment is the difference between catching a defect early and paying to ship it.

Inspection Type	When It Happens	What It Checks	Typical Output
Pre-Production Inspection (PPI)	Before mass production starts, raw materials on-site	Raw materials, components, first-off sample against reference and specification	Go or no-go decision to start production
During Production Inspection (DUPRO)	Typically 15 to 30 per cent completed	Random sample of finished units, in-line workmanship, defect rate mid-flight	Mid-flight defect signal, corrections still possible at scale
Pre-Shipment Inspection (PSI / FRI)	80 to 100 per cent completed, packed for export	Random sample of finished packed goods, AQL sampling, packaging, labelling	Pass or fail verdict, last checkpoint before shipping
Container Loading Supervision (CLS)	At the moment goods are stuffed into the container	Loading procedure, container condition, quantity loaded	Loading verification, seal photo, quantity confirmation

Most importers with recurring orders combine pre-production inspection, during production inspection (DUPRO) and PSI for high-risk product categories. For a first order with a trusted supplier and a standard product, PSI alone can be enough. For a first order with a new supplier, add a first article inspection guide upstream, since a first article inspection is effectively a PPI variant run on the first production unit. At the other end of the cycle, container loading supervision verifies the container itself once the batch has passed PSI.

3. When Should You Trigger a Pre-Shipment Inspection? (Six Scenarios)

Six situations justify a PSI, formulated from the buyer's side.

1. First order with a new supplier: you have no track record with the factory. A pre-shipment inspection in China or another sourcing hub verifies what actually gets shipped against what was ordered.
2. High-value shipment: the cost of receiving defective goods, rework, disposal, lost sales, exceeds the PSI cost by orders of magnitude.
3. Marketplace with strict return policies: Amazon FBA rejects goods that fail to match specifications, and returns eat margins; big-box retailers charge chargebacks for defect rates above tolerance thresholds. See the Amazon FBA requirements guide and shipping from China to Amazon FBA.
4. Products bound for a market with border compliance risk: kids products, cosmetics, toys, electronics. A PSI includes a sample pull for lab test coordination. See the CPSIA compliance guide, the toy safety testing guide and the REACH compliance guide.
5. Order following a quality dispute or defect episode: PSI acts as forensic verification that the corrective action taken by the supplier has held.
6. Any shipment where recall or rework at destination would exceed inspection cost: promotional products bound for a corporate event, gift sets with multi-component assembly, furniture with tight assembly tolerances, cosmetic packaging with visual defect sensitivity. See the promotional product inspection guide, the gift inspection guide, the furniture safety testing guide and the cosmetic packaging guide.

The first scenario, a new supplier, is the most classic trigger and the most cost-effective: a few hundred US dollars spent on a PSI before shipping avoids far larger costs in defect handling downstream.

Not sure whether your shipment situation warrants a PSI? AQF's team scopes the inspection brief with you before dispatching an inspector, whether you are ordering from a new supplier, shipping to Amazon FBA, or protecting a high-value batch. Share the supplier name and product category and we come back with a scoping proposal.

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4. AQL Sampling Explained: How ISO 2859-1 Really Works

AQL sampling is the statistical method that makes PSI possible. Instead of inspecting 100 per cent of a batch, impractical for anything over a few hundred units, the inspector inspects a random sample sized according to ISO 2859-1 and gives a pass or fail verdict on the whole batch.

AQL stands for Acceptable Quality Limit: the maximum percentage of defective units in a batch that would still be considered acceptable when averaged over a series of inspection lots. The international standard is ISO 2859-1:1999. The US standard, ANSI/ASQ Z1.4, uses the same sample size code letter system and produces closely aligned results, though the two standards are maintained separately by ISO and ASQ.

• Level I: a reduced sample, the lowest confidence of the three general inspection levels.
• Level II: the standard commercial default, a balanced sample size and confidence level for most consumer B2B goods.
• Level III: a larger sample, used for higher-value or higher-risk products, plus tightened, normal and reduced switching rules based on inspection history.
• Special levels S-1 to S-4: reserved for tests that are expensive, destructive or time-consuming, such as functional tests on electronics or drop tests on furniture, using smaller sample sizes.

A worked example: for a batch of 3,201 units under Level II normal inspection, single sampling plan, the sample size code letter is L, which corresponds to a sample of 200 units. (A batch of 3,200 units, exactly on the boundary, falls under code letter K with a sample of 125.) Against that sample of 200, typical consumer B2B acceptance numbers are: critical defects at AQL 0 (accept 0, reject 1, meaning any critical defect fails the batch), major defects at AQL 2.5 (accept 10, reject 11), and minor defects at AQL 4.0 (accept 14, reject 15). These figures should be cross-checked against the published ISO 2859-1 table before being used to plan a specific inspection; see AQF's AQL reference page for the fuller table and code letters.

Level II with critical 0, major 2.5, minor 4.0 is the commercial default for consumer B2B goods. Buyers commonly tighten the AQL for high-risk products, such as medical devices or safety-critical parts, and loosen it for low-risk commodities.

5. Defect Classification: Critical, Major, Minor and Why It Matters

Not all defects are equal. AQL sampling classifies defects in three tiers so the inspection verdict reflects the real commercial impact.

A critical defect renders the product unsafe, unsellable, or in violation of a regulatory requirement: a sharp exposed edge, an exposed live electrical part, a missing mandatory safety label, contaminated food or cosmetic packaging. Typical AQL is 0, zero tolerance.

A major defect is a functional or aesthetic issue that would make a reasonable customer return the product or refuse it at reception: the product does not turn on, the wrong colour, a missing part, a broken zipper, the wrong size, a cracked casing. Typical AQL is 2.5 for consumer B2B.

A minor defect is a cosmetic or presentation issue unlikely to trigger a return but that degrades quality perception: a small superficial scratch not visible in use, imperfect printing that remains legible, a loose thread. Typical AQL is 4.0 for consumer B2B.

The defect classification decision is a buyer responsibility. You define critical, major and minor for your specific product category, based on the supplier specification, the target market's regulatory requirements, and your own quality history. AQF's inspectors work from the buyer's defect list plus standard checklists for the product category. A well-defined defect list, sent with the PSI booking, avoids disputes with the supplier after the inspection. See our detailed AQL page for the full sampling tables.

6. What Happens On-Site: The PSI Day, Step by Step

A PSI day follows a consistent sequence, whether the product is a garment, an electronic device, or a piece of furniture.

1. Before the visit: you send the PSI booking with product specification, sample reference, defect list, AQL requirements, on-site tests required, and ship date, and the visit date is confirmed with the factory.
2. Opening at the factory: the inspector arrives, meets factory QC, and verifies the batch is ready, 80 to 100 per cent complete and packed for shipping, before getting access to the finished goods warehouse.
3. Quantity verification: cartons are counted and cross-referenced with the packing list and the purchase order, with discrepancies flagged immediately.
4. Sample selection: the inspector selects random cartons using the ANSI/ASQ Z1.4 sample size code letter for the lot size and inspection level agreed with the buyer. Random selection is critical to the statistical validity of the whole exercise.
5. Sample opening and inspection: the sample units are opened and checked against the buyer specification for quantity, appearance, workmanship, dimensions and weight, colour, logo and labelling, barcode and shipping information, parts and accessories, manuals, assembly, and packing.
6. On-site tests: tests requested by the buyer are executed on-site, commonly including a carton drop test under ASTM D5276, a function test, a colour fastness check, or an adhesive tape test under ASTM D3359. A third-party lab testing pull can also happen at this stage for tests that need a laboratory, and a distribution test under ASTM D4169 distribution testing is common for packaging-sensitive categories.
7. Closing at the factory: the inspector documents findings, photographs all defects with location tags, and communicates a preliminary picture to factory QC, with the formal verdict issued only in the written report.
8. After the visit: the written report is delivered with the pass or fail verdict, defect log, photo evidence, and on-site test results, and you decide how to proceed.

7. Preparing Your PSI Brief (What to Send the Inspector Before the Visit)

The quality of a PSI is a direct function of the quality of the brief. An underprepared PSI catches only the obvious defects; a well-briefed one catches the defects that matter to your specific customers and markets.

1. Purchase order details: PO number, supplier name and address, product SKU, ordered quantity, unit price, ship date, incoterm.
2. Product specification: datasheet, technical drawing with tolerances, material composition, colour reference, weight target, and packaging specification.
3. A reference sample: the golden sample previously approved between buyer and supplier, since the inspector compares the batch to this sample, not just to the paper spec.
4. A defect list: your critical, major and minor defect definitions for this product category, with photos of past defects if available.
5. AQL requirements: general inspection level (I, II or III), AQL per defect class (default 0, 2.5, 4.0), and any tightened or reduced level requested.
6. On-site tests requested: the specific tests to run, with acceptance criteria per test.
7. Sample pull instructions for lab test coordination: whether the inspector should pull additional samples for third-party lab testing, and how many. Common triggers include CPSIA compliance guide requirements, a REACH compliance guide sample, an Amazon FBA distribution test under the ISTA 6-Amazon.com-SIPP protocol, a ASTM D4169 distribution testing test, toy safety testing guide under EN 71 or ASTM F963, and Amazon product testing guide scope.
8. Special instructions: known factory issues, past defect history with this supplier, and your target market with its regulatory requirements.

Send the brief at least three to five working days before the planned PSI date, giving the inspector time to prepare and the factory time to have the batch ready.

8. What a Good Pre-Shipment Inspection Report Contains

The PSI report is what you use to make the shipping decision. Its structure and content matter as much as the inspection itself.

1. Executive summary on page one: overall pass or fail verdict, batch identification, critical, major and minor defect counts, and an on-site test results summary, so the decision-maker can act on page one alone.
2. Factory profile: factory name, address, contact, batch inspected, and production status at the time of inspection.
3. Inspection scope and criteria: product specification reference, AQL level applied, defect classification used, on-site tests requested, and sample size.
4. Quantity verification: ordered versus produced versus packed, cross-referenced with the packing list, with discrepancies documented.
5. Defect log by class: critical, major and minor defects, each with a description, quantity found in the sample, and photo reference, sorted by class then frequency.
6. On-site test results: each test performed, the method used, the acceptance criterion, and a pass or fail per test.
7. Photographic evidence: photos of all defects, the factory environment, sample selection, on-site test setup, and packaging, each dated and tagged with a location and finding reference.
8. Inspector identification and signature: inspector name, date, and factory representative signature where the framework requires it.

A PSI report of 30 to 60 pages is normal for a standard consumer goods batch. A report shorter than 15 pages should raise suspicion, usually light photo evidence or a missing defect breakdown. See a sample AQF pre-shipment inspection report for what a well-structured report looks like.

A good PSI report is only useful if it comes from an inspector who understood your specifications. AQF dispatches category-specialist inspectors and formats reports for buyer decision-making: pass or fail verdict on page one, defect log broken down by class, photo evidence tagged and dated.

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9. Red Flags to Catch When Reading a PSI Report

A PSI report can look impressive and still miss what matters. Here are eight red flags to check before you take the shipping decision.

1. Missing pass or fail verdict on page one: if the report buries the verdict in the last section, the inspector is hedging. A good report states the verdict upfront.
2. Sample size below the AQL requirement: cross-check the sample size on the report against ISO 2859-1 or ANSI/ASQ Z1.4 for the batch size and level. Undersampling gives false confidence.
3. No photo evidence for major or critical defects: every reported defect should have a photo. Defects without photos cannot be verified downstream or shown to the supplier for corrective action.
4. Vague defect descriptions: a note such as some workmanship issues is not a defect log. Look for specific descriptions with quantity and location.
5. On-site test results marked not applicable without explanation: if a test was requested and not performed, the report must explain why.
6. A pass verdict with major defects at or near the reject number: a batch with 10 major defects against a reject threshold of 11 technically passes but is one defect away from failing. Consider requesting sorting or a re-inspection.
7. Photo timestamps missing or inconsistent: good reports include verifiable timestamps on photos. Photos without timestamps could come from any batch, any date.
8. No documentation of the sample selection method: the report should confirm random selection, which cartons and why. Non-random selection biases the whole inspection.

Reading the report critically is part of the buyer's job. See a sample AQF pre-shipment inspection report for a reference on how a well-structured report presents these elements.

10. Integrated QC Workflow: Factory Audit, FAI, DUPRO, PSI and Lab Testing Together

PSI works best as part of an integrated QC programme, not as a standalone insurance policy at the end of the cycle.

Before the first order, a factory audit in China guide or factory audit services engagement verifies the supplier as a company: capacity, systems, ethics and compliance. Before mass production, a first article inspection guide and pre-production inspection verify that the first unit produced matches the golden sample and the specification. During production, at roughly 15 to 30 per cent completion, during production inspection catches defects mid-flight while corrections are still possible at scale. At 80 to 100 per cent completion, our pre-shipment inspection service applies the AQL verification described throughout this guide. In parallel with, or triggered by, the PSI sample pull, third-party lab testing covers regulatory compliance and distribution testing. At container stuffing, container loading supervision verifies the loading procedure, container condition and quantity loaded.

Running the full sequence for every order is overkill for most importers. A realistic default is the full sequence for a first order with a new supplier and for high-value or high-risk shipments, with PSI alone for recurring orders with trusted suppliers on established products. Adjust upward as compliance risk increases, for kids products, cosmetics, electronics or food contact categories.

AQF operates all four inspection types, pre-production, DUPRO, pre-shipment and container loading, plus factory audit services and coordinated lab testing, across major manufacturing hubs in China and Asia. This means an importer can commission the full inspection sequence through our pre-shipment inspection service and its sister services, with consistent reporting and a single point of contact for the whole QC programme.

Frequently Asked Questions

What is a pre-shipment inspection?

A pre-shipment inspection (PSI), also called a final random inspection (FRI), is a quality control check conducted when 80 to 100 per cent of the production is complete and packed for export. An independent third-party inspector visits the factory, selects a random sample of the finished goods using an AQL sampling procedure, and verifies quantity, workmanship, function, dimensions, packaging and labelling against the buyer's purchase order. The inspector then delivers a written report with a pass or fail verdict.

What is the difference between pre-shipment inspection and DUPRO?

Pre-shipment inspection (PSI) happens at 80 to 100 per cent production completion, when the goods are packed for export. During production inspection (DUPRO) happens earlier, typically at 15 to 30 per cent completion, when some finished units already exist but the batch is still in production. DUPRO catches defects mid-flight so corrections are still possible at scale, while PSI is the last checkpoint before shipping.

When should I schedule a pre-shipment inspection?

Six scenarios justify a PSI: your first order with a new supplier, any high-value shipment, products bound for a marketplace with strict return policies (Amazon FBA, big-box retailers), goods entering a market with border compliance risk, orders following a quality dispute or defect episode, and any shipment where recall or rework at destination would exceed the cost of inspection. A PSI is cheap insurance against paying for defective goods.

What is AQL sampling?

AQL, or Acceptable Quality Limit, is a statistical method for inspecting a random sample rather than 100 per cent of a batch. The international standard is ISO 2859-1, aligned with the US standard ANSI/ASQ Z1.4. AQL sampling defines how many units to inspect from a batch of a given size, and how many defects of each class trigger a fail verdict. Level II general inspection is the commercial default for consumer B2B.

What are critical, major and minor defects?

Critical defects are safety or regulatory issues that would make the product unsellable or unsafe: sharp edges, electrical hazards, missing safety labels, contaminated food packaging. Major defects are functional or aesthetic issues that would make a customer return the product: broken function, wrong colour, missing part. Minor defects are cosmetic issues unlikely to trigger a return: small scratch, imperfect printing. Typical AQL values are 0 for critical, 2.5 for major, 4.0 for minor.

What does a good pre-shipment inspection report contain?

A good PSI report contains eight elements: an executive summary with the pass or fail verdict on the first page, factory profile and inspection scope, quantity verification, defect log broken down by class (critical, major, minor), workmanship and functionality test results, packaging and labelling verification, photographic evidence tagged and dated, and the inspector identification with signature. Any missing element (especially photo evidence) is a red flag on the report itself.

How long does a pre-shipment inspection take?

An on-site PSI typically takes one day per inspector for a standard consumer goods batch of a few thousand units. Larger or more complex batches may require two inspector-days or a team. The inspector delivers a written report after the site visit. Reporting turnaround varies by provider and by whether standard or expedited service is chosen. Book the inspection at least a week before the planned ship date to allow time for corrections if needed.

Is pre-shipment inspection mandatory?

For most B2B trade between commercial partners, PSI is not legally mandatory: it is a buyer-driven quality control decision. Some governments do operate mandatory pre-shipment inspection regimes for imports into their territory (typically for customs valuation and to prevent under-invoicing): the World Trade Organization Agreement on Preshipment Inspection governs these state regimes. For most importers sourcing consumer goods from China, PSI is commercial, not regulatory.

What happens if a pre-shipment inspection fails?

A failed PSI gives you four options: request rework (defective units are corrected on-site or reworked in a new production run), request sorting (100 per cent inspection of the batch to remove defective units before shipping), negotiate a discount (accept the batch as-is with a price adjustment reflecting the defect rate), or reject the shipment and hold payment. The right choice depends on defect class, defect rate, delivery deadline, and your commercial relationship with the supplier.

How much does a pre-shipment inspection cost?

Pricing scales with product category, sample size, factory location and inspection scope. A standard PSI on a consumer goods batch typically costs a few hundred US dollars, less than one per cent of the shipment value in most cases. Complex products (electronics with functional tests, cosmetic packaging with tight tolerances, technical apparel) can require more inspector-days and cost more. Compared to the cost of receiving defective goods at destination, PSI is a low-cost insurance step.

Book Your Pre-Shipment Inspection

Planning a shipment from China or Asia and want the peace of mind of an independent pre-shipment inspection? AQF's inspectors operate across the main manufacturing hubs of China, Vietnam, India and South-East Asia. Send us the supplier details, product category, ship date and AQL requirements, and we come back with a fitted PSI plan.

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