use case diagram for library management system

Use case diagram for library management system verification#

Notation is the “ stick man” icon with the actor’s name above or below the icon.Ĭustom icons can also be used to denote actors to represent the actor with more clarity. Actors’ naming should represent the role they play in the system, e.g. The actor is external to the subject and hence lies outside the system’s boundary. #3) Actor: The actor is the entity that interacts with the subject. The interactions and actions between events, actors, and the data lead to the end result which is the Use Case goal. So the system is not the owner of the use case. A specific use case can be referred to by other systems as well. Notation is horizontally shaped oval and is located inside the System boundary rectangle indicating that the use case applies to the mentioned subject. #2) Use Case: It represents a functional unit of a large application. The actors accessing the system are placed outside the system boundary. Notation of System Boundary (Subject) is a rectangle with the System’s name on top of the rectangle.Īll use cases or functionality of the specific system are located inside the rectangle. It details a set of actions between actors and the data consumed and produced if any. #1) System: It is also referred to as scenario or functionality.

Listed below are some important components of Use Case diagrams: The project development can be prioritized as per key deliverable functionalities facilitating better control and management of project revenue.The key development activity status enables the project heads to present the readiness from a customer deliverable point of view. Using Case driven project development and tracking approach help in assessing the progress of the project from a functionality readiness point of view.

Use case diagram for library management system verification#

The association presented between actors and other external applications brings clarity to the validations and checking required for the wholesome verification of the system.

It is presented from the end user’s perspective, making it easy for the developers to understand the business purpose.

It presents a large complex project as a set of small functionalities.

They bring customers, and all other users on the same page, making communication easy.

They are presented in a simple and non-technical way, easy to understand by all technical and business users.

It elicits the functionality as a black box with all the users who have access or a role in it.

Using a Case diagram is a functional requirement documentation technique.

The diagrams do not give the details of deployment, the trigger of the event, etc. It also presents the functionality’s exceptions, pre-condition, and post-condition. The observable outcome of the functionality to the actor and other stakeholders of the system is shown with clarity. It represented the collaboration and interdependence of the functionality and users in a very easy and understandable manner. The presentation is from the perspective of all users giving a high-level design and basic flow of events of the system. The main purpose is to present all functional requirements of the system diagrammatically to all the users who can access the functionality. Hence multiple use case diagrams represent the complete system. For every single functionality representation, a fresh diagram is used. design, implementation, process, and deployment. Use Case diagram represents the system’s functionality connecting all four perspectives, i.e.