1 / 11

G063 - Data flow diagrams

G063 - Data flow diagrams. Learning Objectives:. By the end of this topic you should be able to: describe, interpret and create data flow diagrams. Data Flow Diagrams. show how data moves through a system show the processes that transform inputs into outputs Utilises: external entities

maryam-oneal
Download Presentation

G063 - Data flow diagrams

An Image/Link below is provided (as is) to download presentation Download Policy: Content on the Website is provided to you AS IS for your information and personal use and may not be sold / licensed / shared on other websites without getting consent from its author. Content is provided to you AS IS for your information and personal use only. Download presentation by click this link. While downloading, if for some reason you are not able to download a presentation, the publisher may have deleted the file from their server. During download, if you can't get a presentation, the file might be deleted by the publisher.

E N D

Presentation Transcript

  1. G063 - Data flow diagrams

  2. Learning Objectives: By the end of this topic you should be able to: • describe, interpret and create data flow diagrams

  3. Data Flow Diagrams • show how data moves through a system • show the processes that transform inputs into outputs Utilises: • external entities • represent people, organisations …. • processes • transforms input data into output data • data stores • database file, a paper form, folder in a filing cabinet • flow of data • direction of flow of data in the system

  4. Data Flow Diagrams DFD levels • level 0 (L0) = summary of the system • does not show processes or data stores detail • level 1 (L1) = overview of what is happening within the system • represented in the L0 diagram by central process box

  5. Data Flow Diagrams

  6. Data Flow Diagrams

  7. Data Flow Diagrams

  8. Data Flow Diagrams

  9. Data Flow Diagrams

  10. Data Flow Diagrams

  11. Data Flow Diagrams

More Related