Application Makes Use Case Diagrams – A use case diagram is one of 14 different types of diagrams available in Unified Modeling Language (UML). Therefore, if you use it in a project, you will most likely build a use case diagram. In this case, you may want a sample usage diagram that shows all the elements and components you need.
In this article, you will learn all the basics about use case diagrams and 8 awesome use case diagram examples. continue reading!
Application Makes Use Case Diagrams
Before continuing with the example, it is important to briefly explain what a use case diagram is. This type is a UML behavior diagram because it represents all the ways in which a user interacts with the system. Therefore, a sample use case diagram includes all possible user types (or actors) and their uses. This explicitly establishes the connection between them and other extension connections.
College Management System Project Use Case Diagram
Once you understand what a use case diagram does, you should know everything about its components. As with any other type of chart, there are special symbols and shapes that are used to indicate each element of the chart. Therefore, to understand the example use case diagram, you need to know what each shape represents in order to build a diagram that all your colleagues can understand.
Every system has a predefined limit and this element shows it in the diagram. Additionally, this component can be used to indicate different functions of the system, especially when they target different actors. You can display system boundaries as rectangles in use case diagrams.
The reality is that a single system can have many different types of users. These are called actors in the use case diagram. To add an actor to the chart, you need to create a small stick figure.
This element is located in the center of the diagram. It is actually a component that represents each function of the system. You can add new elements using an ellipse shape.
Use Case Diagram Tool
At this point, we should also touch on the inclusion and expansion relationships that some use cases have. Inclusion is a relationship that indicates that one use case is mandatory and part of another use case. Exclusion is a relationship that indicates that a certain use case is optimal and will be implemented after the first use case.
This element brings actors and use cases together. Communication links connect each actor to relevant use cases. Note that all participants must be committed to at least 1 use case. However, there may be some use cases that are valid in their own right. You can add line-by-line contact links.
Below we discuss some examples of different types of systems so that you can find an example usage model that meets your needs.
The first use case example involves a restaurant system. As shown in the figure, the restaurant has four roles: waiter, customer, chef and cashier.
Solved Consider The Use Case Diagram Shown Below For An
The main use cases for customers are “ordering”, “eating” and “paying for meals”. For long-term use, you can “order wine”, “drink” and “pay for wine”.
Use cases for waiters are “order food”, “serve food” and “pay for food” as they make payment easy. If the customer also orders wine, they have expanded use cases: “order wine”, “buy wine” and “pay for wine”.
The chef interacts with the “order food” and “prepare food” use cases. After all, cashiers only accept payments, so their main use case is “paying for food.” In some cases, there are extended use cases, such as “pay for drinks.”
The example below shows an ATM machine system. In this case, there are three actors: the operator, the customer, and the bank.
Introducing Use Case Diagrams
The operator has only two use cases, “system startup” and “system shutdown”. A bank is a participant whose main purpose is “transaction”. As you can see, the transaction use case includes many other use cases. They are “Withdrawal”, “Deposit”, “Transfer” and “Survey”. The user also has an “Actions” use case along with all other tabs. There are also use case extensions for “invalid PIN code”.
In the example below, there are many actors, such as website users, system authentication, identity providers, and payment services (such as credit card services).
As shown in the figure, users of the website can be new users or returning users. Users interact with use cases such as “view items”, “purchase” and “register customer”. Payment is the use case for this actor.
System authentication interacts with the View Items, Customer Registration, and Order use cases. The identity provider has both “view items” and “order” use cases, while the payment service only interacts with the “withdraw money” use case.
Use Case Diagram
We will demonstrate an online rail reservation system in the usage diagram example below. In this example, there are three main actors; travelers, rail sites, and staff.
The railway website has use cases such as “check ticket availability”, “pay for tickets”, “book tickets”, “fill in personal and travel details”, “cancel tickets” and “refund”. “Book a ticket” refers to the “Pay fare amount” use case. It covers the use cases “Fill in personal information and travel details”, “Ticket booking” and “Ticket cancellation”. Finally, if “Ticket Cancellation” is used, “Ticket Refund” is included.
Travelers interact with the use cases “Check ticket availability”, “Pay amount for ticket”, “Book ticket”, “Fill in profile and travel details” and “Cancel ticket”. The use of “Ticket Cancellation” is only the responsibility of the flight attendant.
In this example, we demonstrate an airport check-in system. In this diagram, the main actors are passengers and tour guides. As shown in the example, tour guides are related to passengers.
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Passenger “Personal Check-in” and “Security Check” use cases are at the highest level. Personal check-in may have an extended use case of “baggage check-in”. As for the tour guide, they have a “Group Check-in” use case related to their “Personal Check-in” use case.
The following example shows a use case diagram for a travel agency system. In this diagram, we consider customers, airlines, travel agencies, and tour companies as actors.
The user has use cases of “booking a flight ticket” and “paying a travel agent”. “Book flight tickets” is an extension of the “Book travel” use case and is related to the “Pay to travel agency”, “Pay for flight tickets” and “Travel agency fees” use cases.
The travel agency has “Airline Booking”, “Airline Delivery” and “Travel Agency Payment” use cases. The same “ticket delivery” also has an extended relationship with the “travel arrangement” use case.
Use Case Diagram
The airline has use cases for “book a flight”, “book a seat” and “pay for a flight”, which include and exclude the relationships we see. Finally, travel companies have use cases of “arrange travel” and “pay for travel”.
In fact, the hospital management system is composed of many modules. But to simplify the example, we only focus on one. In this example we will consider admission to hospital. Therefore, the main players are the buyers.
This particular actor has many responsibilities, which we can see in the diagram. Its main areas of use are “patient registration”, “patient admission”, “patient appointment”, “arranging patient admission”, “insurance forms/requests” and “medical reports”.
You can see that the “Patient Admission” and “Patient Registration” use cases have a “Login” relationship. In addition, “Outpatient” and “Inpatient” are also part of this use case; the latter also involves the “Bed Allocation” use case.
Exploring The Use Case Diagram
Similarly, “Patient Registration” also has “Patient Appointment Scheduling” and “Patient Admission Scheduling” use cases.
An example of a final use case diagram is a user management system. You can see that there are three actors in this particular system: software process group, process owner, and user.
The software process group has “Page Personalization” and “Member Group Settings” use cases. . On the other hand, users only have the “Personalized Page” as their area of use. Process owners have both “Entity Protection” and “Change Process Owner” use cases. As you can see in the example, process owners are directly related to software process groups.
Once you find a usage model example that works for your system, you can build it. This online whiteboard tool makes drawing easy, right at your doorstep
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