In the domain of software testing, the terms "test scenario" and "test case" are foundational yet often confused due to their overlapping nature. A test scenario is a high-level document derived from use cases that outlines what needs to be tested, focusing on real-world applications and end-user perspectives, thus facilitating strategic testing objectives. On the other hand, a test case is a detailed, step-by-step document crafted from test scenarios, designed to verify specific functionalities within a software application. It includes prerequisites, expected outcomes, and actual results, offering a granular approach to testing. The primary distinction lies in their scope and purpose: test scenarios cover broad testing requirements with an emphasis on overall functionality, while test cases provide a precise evaluation of individual features. Both are critical for comprehensive test coverage, ensuring the quality and performance of software applications. Understanding these differences is essential for effective quality assessment in software testing.