Define defect categories first
Critical, major, and minor defects should be agreed in writing before inspection starts.
AQL Calculator
AQL Calculator for Product Inspection
Estimate inspection sample size, acceptance limits, and rejection limits before approving shipment from an Indian supplier.
Inspection Planning Tool
Estimate AQL sample size and defect limits
Use this calculator for buyer planning before a pre-shipment inspection, during-production inspection, or final random inspection. The final inspection plan should be confirmed against the applicable sampling standard, product risk, buyer requirements, and inspection scope.
Planning logic
Lot size is the total number of units offered for inspection.
Inspection level controls sample size. General Level II is commonly used for standard product inspections.
AQL setting defines the maximum tolerance for a defect category in a sampling plan.
Accept / reject limits should be locked in the inspection brief before inspection starts.
Sample Size
80
Code letter J
Sample Share
6.67%
Major Defects
Ac 5 / Re 6
At AQL 2.5
Minor Defects
Ac 7 / Re 8
At AQL 4.0
Critical Defects
Ac 0 / Re 1
Most buyer inspection plans reject the shipment when any critical defect is found.
Ac means the maximum observed defects allowed for that category. Re means the number at which the lot is rejected for that category.
Buyer Guidance
How buyers should use an AQL plan
AQL is a sampling method, not a promise that every unit is defect-free. It helps buyers define a consistent inspection approach before goods are released by a supplier.
Use the correct lot size
The lot size should match the quantity offered for inspection, not only one carton, one SKU, or one purchase-order line unless that is the defined lot.
Choose inspection level by risk
Higher-risk products, new suppliers, and first orders may justify a larger sample size or stricter checklist.
Pair AQL with product checks
AQL should sit alongside workmanship checks, measurements, packaging review, labeling checks, quantity checks, and functional tests.
Inspection Levels
Choosing General Level I, II, or III
General inspection levels affect how many units are checked. The right level depends on product risk, supplier history, buyer tolerance, and inspection objective.
General Level I
A smaller sample. Consider only when risk is lower, supplier history is strong, and the buyer accepts a lighter check.
General Level II
The common default for many final random inspections and pre-shipment inspections.
General Level III
A larger sample. Useful for higher-risk products, new suppliers, or stricter buyer requirements.
Defect Categories
Critical, major, and minor defects
Defect definitions should be product-specific. The examples below help frame the inspection brief before the inspector visits the supplier.
| Category | Meaning | Buyer Example |
|---|---|---|
| Critical defect | A safety, legal, or severe usability problem. | Sharp exposed edge, wrong safety warning, unsafe electrical issue. |
| Major defect | A defect likely to affect saleability, function, or customer acceptance. | Broken stitching, wrong component, incorrect size outside tolerance. |
| Minor defect | A defect that is visible but does not usually affect core function. | Small cosmetic mark, minor color variation, light packaging scuff. |
Mistakes To Avoid
AQL mistakes that weaken inspection results
The calculator helps frame a plan, but the inspection outcome still depends on clear instructions, correct sampling, accurate reporting, and supplier cooperation.
No defect checklist
Without clear defect definitions, the inspection can become subjective and hard to enforce.
Wrong lot size
Using the wrong lot quantity can create the wrong sample size and acceptance limit.
Ignoring SKU spread
A sample should reflect the shipment mix, not only the easiest cartons or one product variant.
Shipping before closure
Inspection findings should be reviewed and resolved before goods are released to freight.
Using AQL for every check
Some checks may require 100% review, functional testing, lab testing, or buyer-specific measurement plans.
Treating AQL as quality control by itself
AQL inspection is a final checkpoint. It does not replace supplier qualification, samples, production controls, and clear specifications.
Buyer Questions
Common questions about AQL inspection
What is AQL?
AQL means acceptable quality limit. It is used in sampling inspection to define acceptance and rejection limits for a lot of goods.
What lot size should I enter?
Enter the number of units offered for inspection. If the shipment has multiple SKUs, the sampling approach should be agreed in the inspection brief.
What AQL should I use for major defects?
Many buyers use AQL 2.5 for major defects, but the right setting depends on product risk, buyer tolerance, regulatory expectations, and supplier history.
Is AQL 4.0 common for minor defects?
AQL 4.0 is often used for minor defects in general consumer-goods inspection, but buyers can choose stricter or looser limits depending on requirements.
Should critical defects be accepted?
Most buyer plans accept zero critical defects. Critical defects can involve safety, legal, or severe usability risk.
Does AQL mean the entire shipment is defect-free?
No. AQL is a sampling method. It helps decide whether a lot should be accepted or rejected based on inspected samples and defined limits.
When should AQL inspection happen?
AQL inspection is commonly used for final random inspection when production is complete and goods are packed, before shipment release.
Related Planning
Connect AQL to inspection and shipment release
AQL should be connected to supplier verification, inspection timing, packaging checks, freight planning, and shipment approval.
AQL Inspection 101
Understand how AQL fits into buyer quality control.
Independent Inspection
Plan third-party inspection before shipment release.
Quality Assurance Inspection
Build quality checkpoints into supplier management.
Factory Audit India
Check supplier capability and compliance before larger orders.
Shipping Estimator
Plan shipment handoff after inspection clearance.
Trade Glossary
Clarify sourcing, inspection, and freight terms.
Plan Inspection
Need help setting an inspection plan for goods sourced from India?
Share your product category, supplier location, order quantity, defect concerns, inspection timing, and buyer requirements. MCR Associates can help organize the inspection scope before shipment release.