What is a scenario in system analysis and design?

In system analysis and design, a scenario is a narrative that describes a specific situation in which a user interacts with a system to achieve a goal. It outlines the context, the user's actions, and the system's responses, helping to identify requirements and functionalities needed. ScenariOS facilitate understanding of user needs and guide the development process by illustrating how the system will be used in real-world situations. They can also aid in testing and validating the system design against user expectations.