Defects in quality means issues or imperfections found in a product that do not meet the established quality standards or customer expectations. Quality defects are typically classified into three categories based on their severity: 1. Minor defects: Aesthetic and cosmetic issues that do not affect the product's core functionality but can still diminish its perceived quality. 2. Major defects: Issues that affect the product's functionality or usability but do not pose an immediate safety risk. 3. Critical defects: The most severe category, as they directly compromise safety, legal compliance, or product reliability, and can lead to serious injuries, legal action, or product recalls.