When should we use use case diagram and activity diagram?

Use cases show what your system should do. Activity diagrams allow you to specify how your system will accomplish its goals.

Is use case diagram same as activity diagram?

The difference between use case diagram and activity diagram is that a use case diagram helps to model the system, user interactions while activity diagram helps to model the work flow of the system.

What is the first step involved in creating an activity diagram?

Step 1: Figure out the action steps from the use case Here you need to identify the various activities and actions your business process or system is made up of.

What can an activity diagram be used for in use case modeling?

We use Activity Diagrams to illustrate the flow of control in a system and refer to the steps involved in the execution of a use case. We model sequential and concurrent activities using activity diagrams.

What is difference between UML and use case diagram?

UML contains different diagrams and Use case is one of it. Use Case diagram defines Behavioural component of Software Design i.e. Actor communicating with the system through Task – Use Case. UML also contains Structural diagrams as well as – such as Class Diagram.

Where can I create an activity diagram?

Creating an Activity Diagram

• Click New > New Diagram form the toolbar.
• In the New Diagram window, select Activity Diagram, then click Next.
• Name the diagram, then click OK.
• Select Vertical Swimlane, then click any empty space on the diagram.
• You can rename partitions by double clicking the name of each partition.

How do you draw a use case diagram?

How to Draw a Use Case Diagram?

1. Identify the Actors (role of users) of the system.
2. For each category of users, identify all roles played by the users relevant to the system.
3. Identify what are the users required the system to be performed to achieve these goals.
4. Create use cases for every goal.
5. Structure the use cases.

What does an activity diagram consist of?

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. An activity is a function performed by the system.

What is an activity diagram how are they constructed?

An activity diagram visually presents a series of actions or flow of control in a system similar to a flowchart or a data flow diagram. Activity diagrams are often used in business process modeling. They can also describe the steps in a use case diagram. Activities modeled can be sequential and concurrent.