Activity diagram is another important diagram in UML to describe the dynamic aspects of the system. Activity diagram is basically a flowchart to represent the flow from one activity to another activity. The activity can be described as an operation of the system.
The control flow is drawn from one operation to another. This flow can be sequential, branched, or concurrent. Activity diagrams deal with all type of flow control by using different elements such as fork, join, etc.
The basic purposes of activity diagrams is similar to other four diagrams. It captures the dynamic behavior of the system. Other four diagrams are used to show the message flow from one object to another but activity diagram is used to show message flow from one activity to another. Activity is a particular operation of the system. Activity diagrams are not only used for visualizing the dynamic nature of a system, but they are also used to construct the executable system by using forward and reverse engineering techniques.
The only missing thing in the activity diagram is the message part. It does not show any message flow from one activity to another. Activity diagram is sometimes considered as the flowchart. Although the diagrams look like a flowchart, they are not. It shows different flows such as parallel, branched, concurrent, and single.
Activity diagrams are mainly used as a flowchart that consists of activities performed by the system. Activity diagrams are not exactly flowcharts as they have some additional capabilities. These additional capabilities include branching, parallel flow, swimlane, etc. Before drawing an activity diagram, we must have a clear understanding about the elements used in activity diagram.
The main element of an activity diagram is the activity itself. An activity is a function performed by the system. After identifying the activities, we need to understand how they are associated with constraints and conditions. Once the above-mentioned parameters are identified, we need to make a mental layout of the entire flow. This mental layout is then transformed into an activity diagram. Following is an example of an activity diagram for order management system.
In the diagram, four activities are identified which are associated with conditions. One important point should be clearly understood that an activity diagram cannot be exactly matched with the code. The activity diagram is made to understand the flow of activities and is mainly used by the business users. After receiving the order request, condition checks are performed to check if it is normal or special order. After the type of order is identified, dispatch activity is performed and that is marked as the termination of the process.
The basic usage of activity diagram is similar to other four UML diagrams. The specific usage is to model the control flow from one activity to another. This control flow does not include messages. Activity diagram is suitable for modeling the activity flow of the system. An application can have multiple systems. Activity diagram also captures these systems and describes the flow from one system to another.UML is a way of visualizing a software program using a collection of diagrams.
The notation has evolved from the work of Grady Booch, James Rumbaugh, Ivar Jacobson, and the Rational Software Corporation to be used for object-oriented design, but it has since been extended to cover a wider variety of software engineering projects. UML 2. The key to making a UML diagram is connecting shapes that represent an object or class with other shapes to illustrate relationships and the flow of information and data.
To learn more about creating UML diagrams:. The current UML standards call for 13 different types of diagrams: class, activity, object, use case, sequence, package, state, component, communication, composite structure, interaction overview, timing, and deployment. These diagrams are organized into two distinct groups: structural diagrams and behavioral or interaction diagrams. They describe the static structure of a system. Learn more.
Watch this short video about UML Class Diagrams Package Diagram Package diagrams are a subset of class diagrams, but developers sometimes treat them as a separate technique.
Package diagrams organize elements of a system into related groups to minimize dependencies between packages. Object Diagram Object diagrams describe the static structure of a system at a particular time. They can be used to test class diagrams for accuracy. Composite Structure Diagram Composite structure diagrams show the internal part of a class. Use Case Diagram Use case diagrams model the functionality of a system using actors and use cases. Activity Diagram Activity diagrams illustrate the dynamic nature of a system by modeling the flow of control from activity to activity.
An activity represents an operation on some class in the system that results in a change in the state of the system. Typically, activity diagrams are used to model workflow or business processes and internal operation.
Sequence Diagram Sequence diagrams describe interactions among classes in terms of an exchange of messages over time. Interaction Overview Diagram Interaction overview diagrams are a combination of activity and sequence diagrams.For more than a century, Westinghouse has consistently provided innovative, reliable, high-quality products and customer service.
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Entity Relationship Diagram Template
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This type of diagram is used in databases or information systems design. Read on to find out how these powerful tools can help your team.
ERDs allow your team to visualize how complex, interconnected entities connect and overlap in a system. This powerful tool is simple to understand and use, making it beneficial for both new and seasoned teammates to collaborate. To educate your teammates: ERDs are powerful tools for educating your teammates on the relationship between systems or entities. Whenever you need to create documentation before making a change: When preparing to change a process, it can be useful to document your existing process.
By doing so, you ensure that all necessary measures are in place in case you need to return to the previous process or iterate on the current one. Simply select this Entity Relationship Diagram template and follow these steps:. Step 1: Identify all entities in the system. An entity should appear only once in a diagram. Create rectangles for all entities and name them properly. Step 3: Identify relationships between entities.
Connect the relationships with lines or arrows. You can customize the diagram according to your needs.How Does Canal Automation Work?
For example, you can add shapes, change colors, make sticky notes, and draw arrows. Invite your teammates to join and collaborate with you on your ERD.
Any changes will be saved automatically. Save time by using our premade Entity Relationship Diagram Template instead of creating your own from scratch. Get started by signing up for free to update it with your own information. Invite your team members to collaborate on your new entity relationship diagram. Miro enables you to engage co-located and remote teams on a virtual whiteboard, without constraints.
Need to share your Entity Relationship Diagram Template with others? Miro has multiple exporting options, like saving to PDF.