![4 shows the use case diagram. There are «include» relationships between... | Download Scientific Diagram 4 shows the use case diagram. There are «include» relationships between... | Download Scientific Diagram](https://www.researchgate.net/publication/318402809/figure/fig36/AS:631678187872301@1527615224805/shows-the-use-case-diagram-There-are-include-relationships-between-Make-a-decision.png)
4 shows the use case diagram. There are «include» relationships between... | Download Scientific Diagram
![Usecase diagram showing the roles and relationships within the status quo | Download Scientific Diagram Usecase diagram showing the roles and relationships within the status quo | Download Scientific Diagram](https://www.researchgate.net/profile/Steven-Corns/publication/257719338/figure/fig2/AS:667639055671309@1536188963676/Usecase-diagram-showing-the-roles-and-relationships-within-the-status-quo.png)
Usecase diagram showing the roles and relationships within the status quo | Download Scientific Diagram
![UML Use Case Diagrams Relationship - Required / Optional AND independent - Software Engineering Stack Exchange UML Use Case Diagrams Relationship - Required / Optional AND independent - Software Engineering Stack Exchange](https://i.stack.imgur.com/Mm09P.png)
UML Use Case Diagrams Relationship - Required / Optional AND independent - Software Engineering Stack Exchange
![Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors). Use case diagrams are UML diagrams describing units of useful functionality (use cases) performed by a system in collaboration with external users (actors).](https://www.uml-diagrams.org/use-case-diagrams/business-use-case-diagram-elements.png)