Activity diagram
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This document describes the key elements of activity diagrams including activities, transitions, guard conditions, decisions, concurrency, and notations. Activities represent steps in a process, transitions connect activities, and guard conditions restrict transitions. Decisions can involve simple true/false tests or choices between options. Activity diagrams can also model the synchronization of concurrent activities and splitting of process flow.
Activity diagram
- 2. Introduction It provides a visual evaluation of use case narration. It identifies- Normal flow Alternate flow It describes- Sequential tasks Conditional tasks concurrency
- 3. Notations Activity A step represent in the process where some tasks/work is being done. That work can be- Calculation Finding some data Manipulating information
- 4. Transition Activities are linked by transition arrows connecting each acting.
- 5. Guard conditions Can be assigned to a transition to restrict the use of a transition. The guard condition must be tested true before transiting to the next activity. Withdraw cash Terminate transition ( Cash has been collected)
- 6. Decisions Diamond in the decision item can be simple true false test. Decision may involve a choice between a set of options. Sufficient conditions Insufficient conditions
- 7. Activity Diagrams can model Concurrency Synchronization of multiple activities Splitting the flow of control into multiple threads O p e n I n c i d e n t A l l o c a t e R e s o u r c e s C o o r d i n a t e R e s o u r c e s D o c u m e n t I n c i d e n t A r c h i v e I n c i d e n t SynchronizationSplitting
- 8. Link For Activity Diagram