What Does AQL Mean? 'AQL' stands for 'Acceptance Quality Limit', and is defined as the "quality level that is the worst tolerable" in ISO 2859-1. It represents the maximum number of defective units, beyond which a batch is rejected. Importers usually set different AQLs for critical, major, and minor defects. Most Asian exporters are familiar with this type of setting. For example: "AQL is 1.5%" means "I want no more than 1.5% defective items in the whole order quantity, on average over … [Read more...]
The different types of sampling plans for QC inspections
If an inspector controls the quality of your products in China, he probably checks only a portion of the whole batch. But how does he decide how many pieces to pick for his inspection? In other words, what sampling plan does he follow? The most commonly used is the single-stage sampling plan by attributes. What does it mean, and what are the other options? A "single-stage sampling plan" dictates that a certain number of pieces (n) should be drawn and inspected. That number n depends … [Read more...]