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AQL (Acceptable Quality Level) In Garment Industry.

Updated: Dec 22, 2023


In the garment industry, quality control is a vital aspect of the production process. AQL (Acceptable Quality Level) system is one of the most commonly used methods for controlling product quality. This system helps to ensure that garments meet the required quality standards and are free from defects.

This article will explore the AQL system in the garment industry, including what it is, how it works, and its benefits.

What is AQL?

AQL stands for Acceptable Quality Level. It is a statistical sampling method used to determine the quality of a batch of products. The AQL system defines the maximum number of defective products that can be present in a batch of goods, and it ensures that the products meet the specified quality standards.

The AQL system has become a popular quality control method in the garment industry due to its simplicity, cost-effectiveness, and ability to produce reliable results.

How AQL Works

The AQL system works by inspecting a sample of products from a batch. The sample is selected randomly, and the number of products to be inspected is based on the AQL level.

The AQL method involves selecting a random sample of garments from a batch and inspecting them for defects or flaws. The number of garments inspected and the acceptable number of defects are determined by the AQL level, which is agreed upon between the manufacturer and the buyer.

For example, if the AQL level is set at 2.5, it means that no more than 2.5% of the garments in the batch can have defects or flaws. The sample size is determined based on the size of the batch, and the inspection is carried out according to established quality control procedures.

If the number of defects found in the sample exceeds the acceptable level, the entire batch may be rejected, or a certain percentage may be reworked or repaired before being shipped to the buyer.

The AQL method is an effective way to ensure that garments meet the required quality standards while also reducing the cost and time involved in inspecting every single garment in a batch. It is widely used in the apparel industry, and manufacturers and buyers alike rely on it to maintain the quality of their products.

Benefits of Using AQL
  1. Consistency: The AQL system ensures that the quality of the apparel products is consistent with the desired standards. This helps to maintain the brand image and customer satisfaction.

  2. Cost-effective: AQL system helps to identify and reject defective products before they reach the customers, reducing the cost of rework, returns, and potential liability.

  3. Objective measurement: The AQL system provides an objective measure of the quality of the products, which reduces the chances of bias or subjective evaluation.

  4. Standardization: AQL system provides a standardized method for quality control, which can be easily communicated and understood by all stakeholders.

  5. Early detection: The AQL system helps to detect and correct quality issues early in the production process, which reduces the risk of production delays or costly recalls.

  6. Quality improvement: By monitoring and analyzing the AQL data, the apparel industry can identify the root causes of quality issues and take corrective actions to improve the overall quality of the products.

  7. Risk management: The AQL system helps to mitigate the risk of quality-related lawsuits, reputation damage, and financial losses due to poor-quality products.

Different Types of AQL Systems

In the apparel industry, there are various AQL systems that are used to determine the acceptable quality level of a batch of garments. The most commonly used AQL systems are as follows:

  1. Single Sampling Plan: In this system, a single sample of garments is randomly selected from a batch, and the number of defects found in the sample is used to determine the acceptance or rejection of the entire batch.

  2. Double Sampling Plan: This system involves two stages of sampling, with the second sample being taken only if the first sample fails to meet the acceptance criteria. The number of defects found in both samples is used to determine the acceptance or rejection of the batch.

  3. Multiple Sampling Plan: This system involves the inspection of multiple samples from a batch, with each sample being inspected sequentially until an acceptance or rejection decision is reached.

  4. Sequential Sampling Plan: This system involves the inspection of samples in a predetermined sequence, with the decision to accept or reject the batch being made based on the results of the inspection of each sample.

  5. Skip-Lot Sampling Plan: This system is used for batches of garments that have a low defect rate and a high level of consistency in quality. In this system, some batches are skipped for inspection based on their previous inspection history.

Each AQL system has its own advantages and disadvantages, and the choice of a system used depends on various factors such as the size of the batch, the level of quality required, and the cost and time involved in the inspection process.

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