Use cases & use case diagrams

Question 1

Functional vs non-functional requirements

Answer 1

Functional:
-Features and capabilities
Non-functional:
-Aspects of the system that are not directly related to the functional behaviour of the system.(quality attributes and constraints)

Question 2

What are use cases generally used for ?

Answer 2

They are used to capture functional requirements.

Question 3

What does developers do in a scenario-based elicitation?

Answer 3

Developers elicit requirements by observing and interviewing users.

Question 4

What are the 3 use case types and formats?

Answer 4

Brief:
-one paragraph summary , usually of the main success scenario.
Casual:
-Informal paragraph format.
Fully dressed:
-All steps and variations are written in detail.

Question 5

Essential vs concrete style

Answer 5

Essential:
-Focus is on intent and we avoid making UI decisions.
Concrete:
-UI decisions are embedded in the use case text.