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Use Case Diagrams technology with ConceptDraw PRO

Use Case Diagrams technology with ConceptDraw PRO

Use case diagrams are used at the development of software and systems for definition of functional system requirements or system of systems. Use case diagram presents the consecution of object’s actions (user’s or system’s) which are executed for reaching the definite result. Read more
This example of bank ATM UML activity diagram was created on the base of UML use case diagram of automated teller machine from the course "Thinking in Java, 2nd edition, Revision 9" by Bruce Eckel published on the website of the Computer Science and Electrical Engineering Department of the University of Maryland, Baltimore (UMBC).
"If you are designing an auto-teller, for example, the use case for a particular aspect of the functionality of the system is able to describe what the auto-teller does in every possible situation. Each of these “situations” is referred to as a scenario, and a use case can be considered a collection of scenarios. You can think of a scenario as a question that starts with: “What does the system do if...?” For example, “What does the auto-teller do if a customer has just deposited a check within the last 24 hours, and there’s not enough in the account without the check having cleared to provide a desired withdrawal?”
Use case diagrams are intentionally simple to prevent you from getting bogged down in system implementation details prematurely...
Each stick person represents an “actor,” which is typically a human or some other kind of free agent. (These can even be other computer systems, as is the case with “ATM.”) The box represents the boundary of your system. The ellipses represent the use cases, which are descriptions of valuable work that can be performed with the system. The lines between the actors and the use cases represent the interactions.
It doesn’t matter how the system is actually implemented, as long as it looks like this to the user."
[csee.umbc.edu/courses/331/resources/tij/text/TIJ213.gif]
This automated teller machine (ATM) UML use case diagram example was created using the ConceptDraw PRO diagramming and vector drawing software extended with the ATM UML Diagrams solution from the Software Development area of ConceptDraw Solution Park. Read more
Bank ATM UML sequence diagram
Bank ATM UML sequence diagram, use case, subject, system boundary, association, actor,
This SysML diagram example was redesigned from Wikimedia Commons file: Use case restaurant model.svg.
"Use case model of a restaurant business." [commons.wikimedia.org/wiki/File:Use_case_restaurant_model.svg]
"The use case diagram describes the usage of a system (subject) by its actors (environment) to achieve a goal, that is
realized by the subject providing a set of services to selected actors. The use case can also be viewed as functionality and/
or capabilities that are accomplished through the interaction between the subject and its actors. Use case diagrams include the use case and actors and the associated communications between them. Actors represent classifier roles that are external to the system that may correspond to users, systems, and or other environmental entities. They may interact either directly or indirectly with the system. The actors are often specialized to represent a taxonomy of user types or external systems." [omg.org/spec/SysML/1.3/]
The SysML diagram example "Use case restaurant model" was drawn using the ConceptDraw PRO diagramming and vector drawing software extended with the SysML solution from the Software Development area of ConceptDraw Solution Park. Read more
Example of SysML use case diagram
Example of SysML use case diagram, use case, requirement diagram, extend path, constraint textual note, communication path, actor,