How do you create an activity diagram?
Table of Contents
How do you create an activity diagram?
How to Draw 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.
- Step 2: Identify the actors who are involved.
- Step 3: Find a flow among the activities.
- Step 4: Add swimlanes.
What are the components of activity diagram?
Basic components of an activity diagram
- Action: A step in the activity wherein the users or software perform a given task.
- Decision node: A conditional branch in the flow that is represented by a diamond.
- Control flows: Another name for the connectors that show the flow between steps in the diagram.
How many types of nodes are there in activity diagram?
An activity diagram consists of a number of nodes connected by arrowed lines (directed edges). There are three main types of node: action nodes, object nodes, and control nodes.
Can activity diagram have two start points?
The initial node is the starting point of an activity. An activity can have more than one initial node; in this case several flows start at the beginning of an activity: It is also possible that an activity has no initial node, but is initiated by an event (action: accepting an event).
What is difference between fork and join and decision node?
A fork node is a control node that splits a flow into multiple concurrent flows. Think of it as starting multiple concurrent tasks. A decision node is a control node that chooses between outgoing flows. Think of it as an if -statement in Java or C#.
Is Start node compulsory in activity diagram?
Activities may have more than one initial node. In this case, invoking the activity starts multiple flows, one at each initial node. Note that flows can also start at other nodes, so initial nodes are not required for an activity to start execution.
What are fork nodes?
A fork node is a control node that splits a flow into multiple concurrent flows A fork node has one incoming edge and multiple outgoing edges.
What is purpose of activity diagram?
An activity diagram shows business and software processes as a progression of actions. These actions can be carried out by people, software components or computers. Activity diagrams are used to describe business processes and use cases as well as to document the implementation of system processes.
What is swimlane in activity diagram?
A swimlane diagram is a type of flowchart that delineates who does what in a process. Using the metaphor of lanes in a pool, a swimlane diagram provides clarity and accountability by placing process steps within the horizontal or vertical “swimlanes” of a particular employee, work group or department.
What is difference between join and merge nodes?
Join nodes are introduced to support parallelism in activities. Merge Node (see reference 2): Merge node is a control node that brings together multiple incoming alternate flows to accept single outgoing flow. There is no joining of tokens.
What are the 4 type of diagram?
The four most common are probably line graphs, bar graphs and histograms, pie charts, and Cartesian graphs.
What is the difference between activity diagram and sequence diagram?
The Sequence diagram shows the message flow from one object to another object. The Activity diagram shows the message flow from one activity to another. Sequence diagram is used for the purpose of dynamic modelling. Activity diagram is used for the purpose of functional modelling.
