What is a use case specification?

What is a use case specification?

• A. A narrative that unfolds when a primary actor invokes the use case
• B. A data model
• C. A UI layout
• D. The code

Answer: (A)

A use case specification captures how the system should behave when a user with a goal interacts with it. It’s written as a narrative that unfolds once a primary actor triggers the use case, outlining the steps the system takes to accomplish that goal, including the main path and any alternate flows, along with preconditions and postconditions. This focuses on the sequence of interactions and the observable outcomes, not on how data is stored, how the UI looks, or how the code is written. A data model deals with data structures, a UI layout shows screen design, and code is the actual implementation.

A use case specification captures how the system should behave when a user with a goal interacts with it. It’s written as a narrative that unfolds once a primary actor triggers the use case, outlining the steps the system takes to accomplish that goal, including the main path and any alternate flows, along with preconditions and postconditions. This focuses on the sequence of interactions and the observable outcomes, not on how data is stored, how the UI looks, or how the code is written. A data model deals with data structures, a UI layout shows screen design, and code is the actual implementation.