A defect, often referred to as a flaw, is an imperfection or shortcoming in a product, process, or system. It can arise from various factors, including design errors, manufacturing mistakes, or material deficiencies. Defects can affect the functionality, safety, or aesthetic appeal of an item, leading to potential failures or dissatisfaction among users. In quality control, identifying and addressing defects is crucial to ensure that products meet established standards. Techniques such as inspections, testing, and statistical process control are commonly used to detect flaws early in the production process, minimizing the impact on consumers and reducing costs associated with returns or repairs.