Validation is the process of ensuring that a system or component meets its intended requirements and functions correctly in its operational environment. It is a critical step in quality assurance, providing confidence that the product or service will perform as expected in real-world scenarios.
Reliability refers to the consistency and dependability of a system, process, or measurement over time. It is crucial for ensuring trust and accuracy in various fields, such as engineering, psychology, and statistics, where repeated results are essential for validation and decision-making.