Non-Destructive Evaluation (NDE) is a set of techniques used to assess the properties and integrity of materials and structures without causing any damage. This method is essential in various industries, including aerospace, construction, and manufacturing, as it helps identify flaws or weaknesses in components while preserving their usability. Common NDE methods include ultrasonic testing, radiographic testing, and magnetic particle inspection. These techniques allow engineers and inspectors to ensure safety and reliability in products and structures, ultimately preventing failures and extending the lifespan of critical assets.