What technique involves using the naked eye to detect defects?

The technique of using the naked eye to detect defects is known as visual inspection. This method is a critical part of quality assurance in various fields, including manufacturing and engineering, where identifying surface flaws or inconsistencies without the use of specialized equipment is essential. Visual inspection allows inspectors to quickly assess the condition of materials, components, or finished products by examining their physical attributes, such as color, shape, texture, and overall integrity.

This form of inspection is advantageous for its simplicity, speed, and cost-effectiveness, making it a fundamental practice in ensuring quality in production processes. While techniques such as visual analysis and surface testing may also involve observing materials, they typically incorporate more systematic approaches or additional equipment, whereas visual inspection relies solely on the observer's sight. Quality control encompasses various measures, including visual inspection, but does not specifically refer to the act of using the naked eye to detect defects alone.