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ZEIT2301 Design of Information Systems Functional Design: Activity Diagrams

ZEIT2301 Design of Information Systems Functional Design: Activity Diagrams. School of Engineering and Information Technology UNSW@ADFA Dr Kathryn Merrick. Topic 03: Activity Diagrams. Objectives Understand and use the notation for activity diagrams, a form of functional modelling

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ZEIT2301 Design of Information Systems Functional Design: Activity Diagrams

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  1. ZEIT2301Design of Information SystemsFunctional Design:Activity Diagrams School of Engineering and Information Technology UNSW@ADFA Dr Kathryn Merrick

  2. Topic 03: Activity Diagrams • Objectives • Understand and use the notation for activity diagrams, a form of functional modelling References Text: Ch 5

  3. Modelling business processes with Activity Diagrams and Use cases • Activity Diagrams and Use Cases are useful tools for modelling business functions • Activity diagrams model the behaviour in a business process • Illustrate the business activities that are performed and how objects (data) move amongst them. • Use Cases model the interaction of the system with its environment

  4. Modelling business processes with Activity Diagrams • Activity diagrams can be used at different levels of abstraction to model • High-level business workflows that involve several Use cases • The details of an individual Use case • Specific details of an individual object method • eg how postage charges should be calculated for a product ordered online. • Need to consider: destination (domestic, international), weight, dimensions, fragility, etc

  5. Modelling business processes with Activity Diagrams • Activity diagrams are similar to traditional flow charts But… • include notation for modelling concurrent (parallel) activities • and complex decision processes

  6. Creating Activity Diagrams • Determine the context or scope of the activity being modelled and then give the diagram an appropriate title. • Identify the activities, control flows, and object flows (eg data, documents) that occur between the activities. • Identify any decisions that are part of the process being modelled. • Identify any prospects for parallelism in the process.

  7. Activity Diagram: Notation

  8. Activity Diagram: Notation

  9. Sample Activity Diagram

  10. Sample Activity Diagram with Swimlanes

  11. Business Process Modelling Business process models describe the activities that collectively support a business process A very powerful tool for communicating the analyst’s current understanding of the requirements with the user

  12. Business Process Modelling Example from BPMI.org

  13. Summary • After today’s lecture you should be able to • Draw activity diagrams for simple business scenarios.

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