Context diagrams and DFD's :( Help !? (1 Viewer)

[antounbros]

Can someone please explain how to do context diagrams and dfd's in a clear logical manner

i seem to struggle with them and i have a exam soon about them and i need to settle this confusion ASAP

And any tips or even youtube tutorials will be greatly appreciated

Thanks in advance

 

[Kat92]

http://www.slideshare.net/gregrobertson/context-and-data-flow-diagrams-dfd
http://www.hsc.csu.edu.au/ipt/project_work/3287/design_tools.htm
http://www.boardofstudies.nsw.edu.au/syllabus_hsc/ipt-specifications.html
http://www.youtube.com/watch?v=exwFMtNpmPM