What defines a User Story in an Agile framework?

In the Agile framework, a User Story is fundamentally defined as the smallest unit of work that encapsulates a feature or requirement from the end-user's perspective. This definition emphasizes the importance of user-centric development, where features are articulated in terms of what they deliver to the end-user rather than technical specifications or project management structures.

User Stories are typically written in simple language, focusing on the needs and experiences of users, which helps the development team understand the desired functionality and prioritize their work accordingly. A well-crafted User Story follows a common format that outlines who the user is, what they want, and why it is valuable. This approach facilitates clearer communication among team members and stakeholders and allows for iterative development, ensuring that feedback is gathered early and often.

In contrast, the other options do not align with the definition of a User Story. A structured project timeline does not capture user needs; a detailed technical specification document is more focused on technical details than user perspectives; and a role assigned to individual team members pertains to team organization rather than the feature-oriented focus characteristic of User Stories. Thus, focusing on the end-user's perspective makes option B the correct choice.