What Is AQL in Apparel Quality Control?
AQL - Acceptable Quality Limit - is the statistical inspection standard used across the global garment industry. Learn what AQL 2.5 means and how it protects your brand.
General industry knowledge • Reviewed by Fenalt editorial team
AQL (Acceptable Quality Limit) is a statistical threshold defining the maximum percentage of defective units in a production lot that is considered acceptable. It determines how many units are inspected and how many defects trigger rejection of the full lot.
Standard reference: ANSI/ASQ Z1.4 - Sampling Procedures and Tables for Inspection by Attributes.
How It Works
Statistical Sampling, Not 100% Inspection
Rather than inspecting every single garment - which would be impractical for bulk orders - AQL uses statistical sampling. The inspector selects a random sample of garments from packed export cartons, inspects them against tech pack specs, and compares the number of defects found against the AQL acceptance table.
If the number of defects found in the sample exceeds the acceptance threshold for the chosen AQL level, the entire lot is rejected for 100% factory re-screening. If defects remain within acceptable limits, the lot passes for export.
The sample size and acceptance number are determined by total order quantity and inspection level, as defined in ANSI/ASQ Z1.4 tables.
Levels
Common AQL Levels in Apparel
Very tight - maximum 1 defect per 100 units. Used for luxury, medical, or high-precision technical garments.
Typical Use: High-end luxury, safety-critical garments
Global industry standard for retail fashion and apparel. Balances quality rigor with practical production realities.
Typical Use: Standard fashion, premium streetwear, branded apparel
More lenient. Used for lower-price-point promotional items, budget accessories, or non-critical workwear categories.
Typical Use: Value retail, accessories, promotional items
Defect Classification
Critical, Major, and Minor Defects
Critical Defect
Zero Tolerance (0 Allowed)Renders the garment unsellable, hazardous, or illegal - e.g. a needle tip fragment left inside, sharp wire edge, missing care law label. Zero critical defects are tolerated in any shipment.
Major Defect
AQL 2.5 Governs (Max 7 per 125)Significantly affects garment function, fit, or retail appearance - e.g. wrong size label, open seam hole, broken zipper, off-spec measurement beyond tolerance. Governed strictly by AQL 2.5.
Minor Defect
AQL 4.0 Governs (Max 10 per 125)Slight cosmetic deviation that does not affect wearability, structural integrity, or fit - e.g. slightly uneven topstitching, loose thread end longer than 1cm. Governed by AQL 4.0.
Questions
Frequently Asked Questions
What does AQL 2.5 mean exactly in garment inspection?
AQL 2.5 means that the inspection is statistically designed to accept a production lot where the true defect rate is 2.5% or lower, with a high statistical probability (95%). It is a statistical sampling threshold defined in ANSI/ASQ Z1.4 tables.
Does an AQL 2.5 pass guarantee that 100% of shipped garments are defect-free?
No. AQL relies on random statistical sampling (inspecting e.g. 125 garments from a 3,000-unit lot). The objective is to detect lots with unacceptable defect rates before export, not to guarantee 100% perfection across every individual piece.
Does Fenalt enforce AQL 2.5 inspections in Bangladesh?
Yes. Fenalt's Dhaka quality engineering team enforces an ANSI/ASQ Z1.4 AQL 2.5 inspection framework across in-line floor audits and final pre-shipment carton inspections.
Should my brand specify AQL standards in its purchase orders?
Yes. Specifying 'AQL 2.5 Major / AQL 4.0 Minor / 0 Critical' in your purchase order or manufacturing agreement establishes a legally clear, objective quality benchmark for accepting or rejecting shipments.
What happens if a production lot fails an AQL 2.5 pre-shipment audit?
If defects exceed allowed acceptance limits, the auditor issues a 'REJECTED' report. The factory must re-screen 100% of packed cartons, repair or replace defective garments, and re-submit the lot for a second AQL inspection at the factory's expense.
How many sample garments are inspected for a 1,000-unit production order?
Under ANSI/ASQ Z1.4 General Inspection Level II, a 1,000-unit order requires inspecting a random sample size of 80 garments. For AQL 2.5, the lot passes if 5 or fewer major defects are found, and fails if 6 or more are found.
Production with documented AQL standards
Fenalt enforces ANSI/ASQ Z1.4 AQL 2.5 across all in-line and final pre-shipment inspections in Dhaka.
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