quartz/content/notes/activity-diagrams.md

title	aliases	tags
activity-diagrams		info201

3.4 Activites and transitions

• activities

  • take place over some pariod of time
  • linked by transitions (arrows)
  • only one starting point potentaily many ending conditions

• Transitions

  • have guard conditions that must be satisfied before the transition can occur

3.5 Decision points

• represent conditional branching
• two or more alternative transitions depending on condition
• every transiiton exiting the decision point must have a guard condition

3.6 Synchonisation bars

• represents two or more activites running in parallel
• transitions can be split into mutiple paths and recombined later
• if a workflow is split then it must be recombined on the same diagram

3.7 swim lanes

• same as BPMN
• show who is responsible for a process
• can represent
  • business organisations
  • depts
  • people (actors)
• can simplify processes

3.8 relationships to use cases

• use case diagrams show the high level interactions between actors and cases
• high level activity diagrams show the sequence of use cases within a workflow

3.8.1 example

3.9 Example producing a book