Use Case Diagrams
| Use-case diagrams shows interaction between a user (human or machine) and the system. Use case diagrams describe the functionality of the new system that you are going build. |
Notations Actor: An actor typically represents a user or another system that will interact with the system.Use case: Use case is a set of scenarios that complete a task. One Use case can include or extend to another Use case Association: Relations between an actor and a Use case and a Use case if self. Boundary: Is a scope boundary of the set of use cases |
When to use?Use cases should be used in analysis phase, requirements gathering & analysis and project planning.For domain modeling. |
Who develops it?Domain Experts.Analysts. Developers. |
Example:Following example shows patient appointment booking functionality. |
Further readings:Writing Effective Use Cases -- Alistair CockburnUML Distilled -- Martine Fowler The Unified Modeling Language User Guide --Grady Booch , James Rumbaugh , Ivar Jacobson Next >> |
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