example of use case diagram with scenario online ordering system

The use case diagram, as one kind of UML diagrams, represents the tasks and several services that the systems need to execute. Test cases and wireframes can be developed based on the defined use cases. In conclusion, the use case diagrams examples capture the functionality of the system by the use of use cases and various actors of the system. Use case driven approach can lead you all the way from analysis to design, and subsequently to development and testing:ĭeveloping a problem statement for the target systemĬapturing requirements - Use case identification (scoping and partitioning of the problem into a set of functional requirements)ĭetailing the event flow for each use case (from analysis to design)īased on the event flow, we can develop a sequence diagram to represent each use case scenario.īy refining the system-level sequence diagram into a more detailed MVC sequence diagram, we can divide the system functionality into 3 layers of reusable software architecture that serves as a clear implementation specification.īy integrating the sequence diagrams of the corresponding use cases, we can identify the set of candidate objects required for the implementation of system functions (use cases) that are currently undeveloped.

The use case model is the conceptual center of the entire SDLC, as it drives every development activity that follows. Why the use case driven approach applies to the entire SDLC? Both, use cases and task models, belong to the family of scenario-based notations and as such capture sets of usage scenarios of the system. View and play PowerPoint presentations online.

Example of use case diagram with scenario online ordering system