BCS PC-BA-FBA-20 Exam - Topic 1 Question 22 Discussion

The Use Case Diagram is a conceptual model that shows the interaction between users (actors) and the required features (use cases) of the system. In an Agile context, use cases provide a high-level view of the system's intended functionality, which can be directly mapped to Epics and subsequently decomposed into lower-level User Stories. The use case diagram helps the team understand the scope and the user's interaction paths, making it an excellent visual tool for managing and breaking down the product backlog (of user stories) into manageable chunks. The other options are too technical (A, D) or focus only on object state (B).

(Reference: BCS Requirements Engineering / BCS Agile -- Use Case Modelling and Product Backlog Management)