You can create a UML use case diagram in Visio lớn summarize how users (or actors) interact with a system, such as a software application. An actor can be a person, an organization, or another system.
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Use case diagrams show the expected behavior of the system. They don"t show the order in which steps are performed. (Use a sequence diagram to lớn show how objects interact over time.)
Defining the system boundary determines what is considered external or internal khổng lồ the system.
An actor represents a role played by an outside object. One object may play several roles and, therefore, is represented by several actors.
An association illustrates the participation of the actor in the use case.
A use case is a phối of events that occurs when an actor uses a system lớn complete a process. Normally, a use case is a relatively large process, not an individual step or transaction.
Create a new use case diagram
On the File tab, point to New.
in the Search box, type UML use case.
From the tìm kiếm results, select UML Use Case.
In the dialog box, select the blank template or one of the three starter diagrams. (A mô tả tìm kiếm of each one is shown on the right when you select it.) Then select either Metric Units or US Units.
Select Create.
The diagram opens. You should see the Shapes window next lớn the diagram. A UML Use Case stencil is open in the Shapes window.
(If you don’t see the Shapes window, go khổng lồ View > Task Panes and make sure that Shapes is selected. If you still don’t see it, cliông chồng the Exp& the Shapes window button on the left.)
Add a subsystem khổng lồ the use case diagram
Drag a Subsystem shape onlớn the drawing page. The subsystem can represent your entire system or a major component.
Double-cliông xã the Subsystem shape, và then type a new name for the for it, or press the Delete key to delete the existing name. Cliông chồng outside the shape on the drawing page.
To resize the subsystem, select the shape, và then drag a selection handle.
Add shapes and connectors khổng lồ the diagram
Use connector shapes to lớn indicate relationships between shapes in the diagram. There are five sầu connectors available:
| Association
| Shows the relationship of an actor khổng lồ a use case. |
| Dependency
| Indicates that one use case has a dependency on another. |
| Generalization
| Indicates that a use case is a specific way to lớn achieve goals of the general use case. |
| Include
| Shows how a use case is broken into lớn smaller steps. |
| Extend
| Shows that one use case adds functionality khổng lồ another. |
Example: To indicate a relationship between an actor và a use case
In a use case diagram, drag an Association connector shape onkhổng lồ the drawing page.
Glue one endpoint of the Association shape to lớn a connection point on an Actor shape. Glue the other endpoint to lớn a connection point on a Use Case shape.
See Also
For more information about use case diagrams (và procedures for using neftekumsk.com Visual Studio khổng lồ create use case diagrams), go to UML Use Case Diagrams: Guidelines.
Note: Creating and editing UML diagrams on Visio for the web requires a Visio Plan 1 or Visio Plan 2 license, which is purchased separately from neftekumsk.com 365. For more information, contact your neftekumsk.com 365 admin. If your admin has turned on "self-service purchasing," you can buy a license for Visio yourself. For more details, see Self-service purchase FAQ.
Create a new use case diagram
Near the upper right corner of the page, select More templates.
In the Gallery, scroll down to the UML Use Case row.
The first thành quả in the row represents a blank template plus the companion stencil. The other items in the row are sample diagrams that have sầu some shapes already drawn to lớn help you get started quickly.
Cliông xã any công trình to see a larger pđánh giá.
When you find the diagram you want to lớn use, cliông xã its Create button.
The new diagram, with the related stencil, opens in your browser.
Add a subsystem to lớn the use case diagram
Drag a Subsystem shape onto lớn the drawing page. The subsystem can represent your entire system or a major component.
Double-clichồng the Subsystem shape, và then type a new name for the for it, or press the Delete key lớn delete the existing name. Cliông xã outside the shape on the drawing page.
To reform size the subsystem, select the shape, & then drag a selection handle.
Add shapes and connectors to lớn the diagram
Use connector shapes khổng lồ indicate relationships between shapes in the diagram. There are five connectors available:
| Association
| Shows the relationship of an actor to a use case. |
| Dependency
| Indicates that one use case has a dependency on another. |
| Generalization
| Indicates that a use case is a specific way to lớn achieve goals of the general use case. |
| Include
| Shows how a use case is broken into smaller steps. |
| Extend
| Shows that one use case adds functionality to another. |
Example: To indicate a relationship between an actor và a use case
In a use case diagram, drag an Association connector shape onto lớn the drawing page.
Glue one endpoint of the Association shape lớn a connection point on an Actor shape. Glue the other endpoint to a connection point on a Use Case shape.
Visio for the web saves automatically. To rename a drawing, double-clichồng lớn select the mặc định name (such as Drawing1) at the top of the drawing & then type a new name over it.
See Also
For more information about use case diagrams (and procedures for using neftekumsk.com Visual Studio khổng lồ create use case diagrams), go to UML Use Case Diagrams: Guidelines.
Create a new use case diagram
On the File tab, point to New.
in the Search box, type UML use case.
From the tìm kiếm results, select UML Use Case.
In the dialog box, select the blank template. Then select either Metric Units or US Units.
Select Create.
The diagram opens. You should see the Shapes window next to the diagram. A UML Use Case stencil is open in the Shapes window.
(If you don’t see the Shapes window, go to lớn View > Task Panes and make sure that Shapes is selected. If you still don’t see it, clichồng the Expvà the Shapes window button on the left.)
Add a subsystem to the use case diagram
Drag a Subsystem shape onto the drawing page. The subsystem can represent your entire system or a major component.
Double-clichồng the Subsystem shape, và then type a new name for the for it, or press the Delete key lớn delete the existing name. Click outside the shape on the drawing page.
To rekích thước the subsystem, select the shape, và then drag a selection handle.
Add shapes & connectors to the diagram
Use connector shapes to indicate relationships between shapes in the diagram. There are five sầu connectors available:
| Association | Shows the relationship of an actor lớn a use case. |
| Dependency | Indicates that one use case has a dependency on another. |
| Generalization | Indicates that a use case is a specific way khổng lồ achieve goals of the general use case. |
| Include | Shows how a use case is broken inkhổng lồ smaller steps. Xem thêm: Hình Ảnh Nhà Sân Vườn Đẹp Ý Tưởng, Tổng Hợp 99 Mẫu Thiết Kế Sân Vườn Đẹp 2021 |
| Extend | Shows that one use case adds functionality khổng lồ another. |
Example: To indicate a relationship between an actor and a use case
In a use case diagram, drag an Association connector shape onto lớn the drawing page.
Glue one endpoint of the Association shape to lớn a connection point on an Actor shape. Glue the other endpoint lớn a connection point on a Use Case shape.
See Also
For more information about use case diagrams (and procedures for using neftekumsk.com Visual Studio khổng lồ create use case diagrams), go lớn UML Use Case Diagrams: Guidelines.
On the File tab, point khổng lồ New.
Under Template Categories, click Software và Database.
Clichồng UML Model Diagram. A blank drawing page appears.
In the tree view, right-cliông xã the package or subsystem in which you want lớn include a use case diagram, then point khổng lồ New, & then clichồng Use Case Diagram.
A blank page appears, & the UML Use Case stencil becomes the top-most stencil. An icon representing the diagram is added khổng lồ the tree view.
Note: If the tree view is not visible, on the UML tab, in the Show/Hide group, select Model Explorer.
To indicate a System Boundary in a use case diagram
Drag a System Boundary shape onlớn the drawing page.
Double-clichồng the System Boundary shape, and then type a new name for the system or press the DELETE key lớn delete the existing name. Clichồng outside the shape on the drawing page.
To reform size the system boundary, select the shape, and then drag a selection handle.
Use Communicates shapes to lớn indicate relationships between use cases & actors.
To indicate a relationship between an actor và a use case
In a use case diagram, drag a Communicates shape onto lớn the drawing page.
Glue one endpoint of the Communicates shape to lớn a connection point on an Actor shape. Glue the other endpoint lớn a connection point on a Use Case shape.
If you want khổng lồ add an arrow to lớn indicate the flow of information, vì the following:
Double-clichồng the Communicates shape, then, under Association, click the end you want lớn edit, and then clichồng Properties.
In the Association End category, kiểm tra IsNavigable, cliông chồng OK, then clichồng OK again.
Right-cliông chồng the Communicates shape and cliông chồng Shape Display Options. Under End options, select End navigability, và then clichồng OK.
Use Uses & Extends shapes khổng lồ indicate the relationships between use cases.
To indicate a uses relationship between two use cases
In a use case diagram, drag a Uses relationship shape onkhổng lồ the drawing page.
Glue the Uses endpoint without an arrowhead to a connection point on the Use Case shape that uses the behavior of the other use case.
Glue the Uses endpoint (with an arrowhead) lớn a connection point on the use case being used.
Double-cliông chồng the Uses shape lớn open the UML Generalization Properties dialog box. Add property values, and then clichồng OK.
To indicate an extends relationship between two use cases
In a use case diagram, drag an Extends shape onkhổng lồ the drawing page.
Glue the Extends endpoint without an arrowhead khổng lồ a connection point on the use case providing the extension.
Glue the Extends endpoint with an arrowhead khổng lồ a connection point on the base use case.
Double-cliông xã the Extends shape to lớn open the UML Generalization Properties dialog box. Add the property values, và then click OK.
Double-cliông xã any shape (except the System Boundary shape) lớn open its UML Properties dialog box where you can add a name, attributes, operations, and other property values.
Save the diagram.
On the File thực đơn, point to New, point to lớn Software and Database, & then clichồng UML Model Diagram.
In the tree view, right-cliông chồng the package or subsystem in which you want to lớn include a use case diagram, point to lớn New, và then cliông xã Use Case Diagram.
A blank page appears, và the UML Use Case stencil becomes the top-most stencil. An inhỏ representing the diagram is added to lớn the tree view.
Note: If the tree view is not visible, on the UML thực đơn, point to View, & then cliông xã Model Explorer.
To indicate a system boundary in a use case diagram
Drag a System Boundary shape onlớn the drawing page.
Double-cliông chồng the System Boundary shape, và then type a new name for the system or press the DELETE key to lớn delete the existing name. Cliông xã outside the shape on the drawing page.
To reform size the system boundary, select the shape, and then drag a selection handle.
Use Communicates shapes khổng lồ indicate relationships between use cases & actors.
To indicate a relationship between an actor and a use case
In a use case diagram, drag a Communicates shape onto the drawing page.
Glue one endpoint of the Communicates shape to lớn a connection point on an Actor shape. Glue the other endpoint khổng lồ a connection point on a Use Case shape.
If you want to add an arrow to lớn indicate the flow of information, bởi the following:
Double-cliông xã the Communicates shape, then, under Association, cliông chồng the over you want lớn edit, and then clichồng Properties.
In the Association End category, kiểm tra IsNavigable, click OK, then cliông xã OK again.
Right-cliông xã the Communicates shape & cliông xã Shape Display Options. Under End options, select End navigability, và then clichồng OK.
Use Uses và Extends shapes lớn indicate the relationships between use cases.
To indicate a uses relationship between two use cases
In a use case diagram, drag a Uses relationship shape onto lớn the drawing page.
Glue the Uses endpoint without an arrowhead lớn a connection point on the Use Case shape that uses the behavior of the other use case.
Glue the Uses endpoint (with an arrowhead) lớn a connection point on the use case being used.
Double-clichồng the Uses shape khổng lồ open the UML Generalization Properties dialog box. Add property values, và then click OK.
To indicate an extends relationship between two use cases
In a use case diagram, drag an Extends shape onlớn the drawing page.
Glue the Extends endpoint without an arrowhead lớn a connection point on the use case providing the extension.
Glue the Extends endpoint with an arrowhead to a connection point on the base use case.
Double-cliông xã the Extends shape to lớn open the UML Generalization Properties dialog box. Add the property values, và then click OK.
Double-cliông chồng any shape (except the System Boundary shape) lớn open its UML Properties dialog box where you can add a name, attributes, operations, và other property values.
