AQL Inspection Guide: Acceptable Quality Limit for China Sourcing | $169
AQL — Acceptable Quality Limit — is the most misunderstood term in import inspection. Many new importers think AQL 2. 5 means "2.
AQL — Acceptable Quality Limit — is the most misunderstood term in import inspection. Many new importers think AQL 2.5 means "2.5% defective maximum." That's wrong. It actually means your supplier has a 95% chance of passing inspection if the true defect rate is 2.5% or below. Here's exactly how AQL works for China factory inspection, what levels you should choose, and how to avoid paying for defects your supplier should have caught.
What Is AQL in Product Inspection?
AQL defines the worst-quality level that is still considered acceptable for a production batch. It's not zero defects — because zero defects is economically impossible for most manufacturing. The AQL standard (ISO 2859 / ANSI ASQ Z1.4) uses statistical sampling to decide whether a batch passes or fails based on the number of defects found in a random sample.
What Are the Standard AQL Levels Used in China?
| AQL Level | Acceptable Defect Rate | Best For |
|---|---|---|
| AQL 4.0 | Up to 4% defects tolerated | Commodity goods, low-risk packaging, industrial supplies |
| AQL 2.5 | Up to 2.5% defects tolerated | Standard consumer goods, general merchandise |
| AQL 1.0 | Up to 1% defects tolerated | Electronics, toys, children's products, premium goods |
| AQL 0.65 | Up to 0.65% defects tolerated | Medical devices, safety-critical parts, automotive |
Most FBA importers use AQL 2.5 for general merchandise and AQL 1.0 for electronics, toys, and products with safety implications. You can also use different AQL levels for different defect types — for example, AQL 1.0 for critical defects and AQL 4.0 for minor cosmetic issues.
How Does AQL Sampling Work?
Here's the step-by-step process your inspector follows:
Step 1: Determine Sample Size
The inspector looks up the batch size on the AQL table. A 1,000-unit batch requires 80 samples for normal inspection (Level II). A 5,000-unit batch requires 200 samples. Larger batches need proportionally fewer samples per unit — economies of scale in testing.
Step 2: Classify Defects
Every defect found falls into one of three categories:
- Critical — makes the product unsafe or illegal (lead paint, no FCC label, choking hazard). Zero tolerance.
- Major — affects functionality, durability, or appearance. Normally 1-3 defects allowed depending on AQL level.
- Minor — cosmetic issues that don't affect use. More lenient, typically 5-10 defects allowed.
Step 3: Compare Against the Accept/Reject Table
For AQL 2.5 on 80 samples: the batch passes if 5 or fewer defective units are found. It fails if 6 or more are defective. The inspector doesn't check every unit — but if the sample fails, the entire batch is assumed to have the same defect rate.
Step 4: Issue Pass/Fail
A passing AQL result means the batch can ship. A failed result means you can reject the batch, request the factory sort and rework, then schedule a re-inspection. CloudSpects inspectors stay on site for rework supervision — you only pay for the extra day.
What's the Difference Between Normal, Tightened, and Reduced Inspection?
ISO 2859 has three inspection severities. You start at Normal. If your factory consistently passes, the standard allows switching to Reduced (smaller sample size, cheaper). If the factory fails, it shifts to Tightened (larger sample, harder to pass). Most importers stay on Normal or Tightened for first-time suppliers.
Frequently Asked Questions
Should I use AQL 2.5 or AQL 1.0 for my Amazon product?
If you're selling electronics, toys, baby products, or anything safety-related, use AQL 1.0. For apparel, home goods, and general merchandise, AQL 2.5 is standard. Your CloudSpects inspector can recommend the right level based on your product category.
Can I choose different AQL levels for different defect types?
Yes. The most common setup is AQL 0 (zero tolerance) for critical defects, AQL 1.0 for major defects, and AQL 2.5 or 4.0 for minor defects. This is written into your inspection agreement before the inspector arrives.
Does a failed AQL inspection mean I can't ship the goods?
Correct — if your contract says "pass AQL 2.5 before shipment." A failed inspection is grounds to reject the batch and deduct from your supplier's payment. Always write AQL acceptance criteria into your purchase order terms.
How does CloudSpects handle failed batches?
We give you a full report with photos of every defect. If you decide to reject the batch, your inspector can supervise the factory's sorting and rework. We then re-inspect at a reduced rate — typically half-day for the second visit.
Frequently asked questions
What Is AQL in Product Inspection?
AQL defines the worst-quality level that is still considered acceptable for a production batch. It's not zero defects — because zero defects is economically impossible for most manufacturing. The AQL standard (ISO 2859 / ANSI ASQ Z1.4) uses statistical sampling to decide whether a batch passes or fails based on the number of defects found in a random sample.
What Are the Standard AQL Levels Used in China? AQL Level Acceptable Defect Rate Best For AQL 4.0 Up to 4% defects tolerated Commodity goods, low-risk packaging, industrial supplies AQL 2.5 Up to 2.5% defects tolerated Standard consumer goods, general merchandise AQL 1.0 Up to 1% defects tolerated Electronics, toys, children's products, premium goods AQL 0.65 Up to 0.65% defects tolerated Medical devices, safety-critical parts, automotive Most FBA importers use AQL 2.5 for general merchandise and AQL 1.0 for electronics, toys, and products with safety implications. You can also use different AQL levels for different defect types — for example, AQL 1.0 for critical defects and AQL 4.0 for minor cosmetic issues. How Does AQL Sampling Work?
Here's the step-by-step process your inspector follows:
Step 1: Determine Sample Size The inspector looks up the batch size on the AQL table. A 1,000-unit batch requires 80 samples for normal inspection (Level II). A 5,000-unit batch requires 200 samples. Larger batches need proportionally fewer samples per unit — economies of scale in testing. Step 2: Classify Defects Every defect found falls into one of three categories: Critical — makes the product unsafe or illegal (lead paint, no FCC label, choking hazard). Zero tolerance. Major — affects functionality, durability, or appearance. Normally 1-3 defects allowed depending on AQL level. Minor — cosmetic issues that don't affect use. More lenient, typically 5-10 defects allowed. Step 3: Compare Against the Accept/Reject Table For AQL 2.5 on 80 samples: the batch passes if 5 or fewer defective units are found. It fails if 6 or more are defective. The inspector doesn't check every unit — but if the sample fails, the entire batch is assumed to have the same defect rate. Step 4: Issue Pass/Fail A passing AQL result means the batch can ship. A failed result means you can reject the batch, request the factory sort and rework, then schedule a re-inspection. CloudSpects inspectors stay on site for rework supervision — you only pay for the extra day. What's the Difference Between Normal, Tightened, and Reduced Inspection? ISO 2859 has three inspection severities. You start at Normal . If your factory consistently passes, the standard allows switching to Reduced (smaller sample size, cheaper). If the factory fails, it shifts to Tightened (larger sample, harder to pass). Most importers stay on Normal or Tightened for first-time suppliers. Frequently Asked Questions Should I use AQL 2.5 or AQL 1.0 for my Amazon product?
If you're selling electronics, toys, baby products, or anything safety-related, use AQL 1.0. For apparel, home goods, and general merchandise, AQL 2.5 is standard. Your CloudSpects inspector can recommend the right level based on your product category.
Can I choose different AQL levels for different defect types?
Yes. The most common setup is AQL 0 (zero tolerance) for critical defects, AQL 1.0 for major defects, and AQL 2.5 or 4.0 for minor defects. This is written into your inspection agreement before the inspector arrives.
Does a failed AQL inspection mean I can't ship the goods?
Correct — if your contract says "pass AQL 2.5 before shipment." A failed inspection is grounds to reject the batch and deduct from your supplier's payment. Always write AQL acceptance criteria into your purchase order terms.
How does CloudSpects handle failed batches?
We give you a full report with photos of every defect. If you decide to reject the batch, your inspector can supervise the factory's sorting and rework. We then re-inspect at a reduced rate — typically half-day for the second visit.