Critical Defects
Sample Size
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Accept Point
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Reject Point
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ForQC Services provides AQL Inspection Services to help buyers, importers, distributors, and businesses verify product quality before shipment.
Using AQL Sampling Inspection, a representative sample from a lot or batch is inspected and evaluated against predetermined Accept and Reject criteria based on the applicable sampling standard and product requirements.
AQL: ANSI/ASQ Z1.4 Standard
ISO 9001:2015 – CQI | IRCA Trained
HACCP: SGS Academy Trained
AQL: ANSI/ASQ Z1.4 Standard
ISO 9001:2015 – CQI | IRCA Trained
HACCP: SGS Academy Trained
AQL: ANSI/ASQ Z1.4 Standard
ISO 9001:2015 – CQI | IRCA Trained
HACCP: SGS Academy Trained
AQL Inspection (Acceptable Quality Limit) is a quality inspection method that uses statistical sampling to evaluate whether a lot or batch of products meets predetermined acceptance criteria.
During an AQL inspection, a specific number of units are selected as samples and inspected according to the agreed checklist and product specifications.
The inspection results are then compared with the applicable Accept Number and Reject Number based on the lot size, inspection level, and selected AQL values.
AQL sampling allows businesses to perform structured quality control without inspecting every unit in a shipment.
Use the AQL Sampling Calculator from ForQC Services to help determine sample size and acceptance parameters based on lot size, inspection level, and AQL values.
The calculator can help identify:
Enter the total number of units in the shipment or production batch.
Choose the inspection level according to your quality control requirements.
Enter the applicable AQL value for the defect category being evaluated.
The calculator will provide the applicable sample size and Accept/Reject criteria based on the selected sampling parameters.
The first step in an AQL sampling process is determining the appropriate code letter. The code letter is based on two factors: the total number of units in the lot and the selected inspection level.
Use Table A to locate the applicable lot size, then match it with the chosen inspection level. The resulting code letter is used as the reference for determining the required sample size and acceptance criteria in the next sampling table.
Example: For a shipment containing 4,000 units inspected under General Inspection Level II, the applicable sampling code is Letter L.
Once the code letter has been identified, use it with the selected AQL value to determine the appropriate sample size, Accept Number, and Reject Number.
Reference: The sampling tables shown on this page are based on ANSI/ASQ Z1.4 – 2008.
After identifying the appropriate AQL code letter, the next step is to determine the required sample size and the applicable acceptance criteria.
Use the code letter together with your selected AQL value in the sampling table. The corresponding result indicates the number of units that should be inspected, along with the maximum number of defects allowed for the lot to be accepted.
Example: For Code Letter L with an AQL of 2.5, the required sample size is 200 units.
If the inspection identifies 10 or fewer defective units, the lot meets the specified acceptance criteria. If 11 or more defective units are found, the lot does not meet the acceptance criteria and is rejected according to the selected sampling parameters.
This process provides a clear and consistent basis for evaluating whether a production lot meets the defined quality requirements.
Calculate sample size and acceptance criteria based on AQL sampling plans.
Note: Results are based on single sampling plans for normal inspection. Sample size will be equal to lot size when the calculated sample size equals or exceeds the lot quantity.
Quality problems discovered after shipment can result in additional costs, delays, returns, customer complaints, and supplier disputes.
Conducting an AQL Inspection before shipment helps businesses obtain an objective view of product quality before goods leave the supplier.
Potential defects can be identified before products are shipped to buyers or customers.
Products can be inspected against purchase orders, specifications, approved samples, technical drawings, and agreed checklists.
Inspection results can be evaluated against predetermined AQL acceptance criteria.
Inspection results can provide useful information for monitoring supplier quality and production consistency.
Inspection reports and defect documentation can support quality evaluation and corrective action.
Independent quality inspections and technical audits across Indonesia, delivering verified results, fast reporting, and full supply chain transparency.
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