UML Use Case Diagram Tutorial | Definition, Symbols and More

hello all welcome to edrawmax let's begin with understanding what a use case diagram is a use case is a list of actions or event steps that typically defines the interactions between the role of an actor and a system to achieve a goal now let's learn more about the origins of use cases use case modeling is associated with uml even though it was introduced before uml in 1986 ivar jacobson first developed formulated textual and visual modeling techniques for specifying use cases in 1992 he co-authored the book object-oriented software engineering now let's learn when to apply these use case diagrams uml use case diagrams are ideal for demonstrating the goals of system user interactions essential for defining and organizing functional requirements in a system specifying the context and requirements of a system and modeling the basic flow of events in a use case now let's look at use case diagram symbols and notations here you can see the example use case diagram with notation actor actors represent the people actually employing the use cases an association is aligned between actors and use cases which is important to know which actors are associated with which use cases a system boundary box is a box that sets a system's scope to use cases and any use cases outside the box will be outside the scope of that system for packages uml shape lets you put different elements into groups let's find the easiest way to identify the actors to identify the actors of your system these questions can provide clarity who uses the system who installs the system who starts up the system who maintains the system who shuts down the system what other systems use this system who gets information from this system who provides information to the system and does anything happen automatically at the present time after actors have been identified the next step is to identify use cases by focusing on these questions does the system store information if yes what actors will create read update or delete this information what functions will the actor want from the system if there are external events in the system then what actor informs the system of those events and does the system need to notify an actor about changes in the internal state now let's learn more about use case relationships extends the stereotype extends identifies as an extended relationship and the invalid password use case includes the behavior specified by the base use case login account include the stereotype include identifies the relationship as an include relationship includes the relationship between the use cases when a use case is depicted as using the functionality of another use case generalization a generalization relationship with a triangle arrowhead is a parent-child relationship between use cases now we'll learn how to draw a use case diagram first identify the actors of the system and the role of the users next identify all roles played by the category of users related to the system then recognize what the user's requirements of the system are you have to create each use case for every goal structuring use cases is necessary prioritization evaluation estimation and validation of the users as required now let's draw a use case diagram in edraw max navigate to file select the new option and select software and database from the list now click on software development and then choose uml modeling to draw a use case diagram in edraw max there you will find various templates of effective use case diagrams to draw based on your requirements click on the plus icon to open a new drawing sheet you can directly drag the uml use case diagram symbols from the symbol library on the left into the drawing sheet as needed [Music] let's drag and drop the system container onto the sheet which will be considered as system boundary boxes [Music] here we will draw a website use case diagram to visually represent the unified modeling language [Music] the actor symbol is placed as it can be a person an organization or an outside system that interacts with your application or system [Music] do [Music] continue drawing your use case diagram to meet your needs incorporating its system functions building blocks relationships and notations etc [Music] [Music] here include symbolizes the relationship between the use cases significantly used when a use case is depicted as the functionality of another use case [Music] [Music] do [Music] here extends identifies as an extended relationship between use cases [Music] now let's see more examples of use case diagrams here's an event management use case diagram this is a student management use case diagram and a library management system use case diagram thanks for watching and don't forget to subscribe to our channel for more edrawmax videos please find the link in the description below to try e-draw max online or to download the software

Channel: Wondershare Edraw

Views: 63,798

Keywords: Unified Modelling Language, Use case diagram, use case, use case diagram tutorial, uml use case diagram, how to use case, use case uml, what is use case, use case diagram uml, use case diagram definition, learning use case diagram, example of use case diagram, components of use case diagram, purpose of use case diagram, use case diagram example, uml use case diagram tutorial, use case diagram symbols, use case diagram include and extend, how to draw use case

Id: uNtoyXJ1VDc

Length: 8min 54sec (534 seconds)

Published: Wed Dec 08 2021