example music CD store on the web

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example = music CD store on the web context diagram shows system and all external entity interfaces University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 1

University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 2

part of the hierarchy diagram University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 3

University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 4

another part of the hierarchy diagram University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 5

University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 6

final hierarchy diagram University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 7

note. customer information + cd buy list = shopping cart Create Read Update Delete University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 8

note. customer information + cd buy list = shopping cart Create Read Update Delete University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 9

in tutorial you will discuss these entities we may also need some information about these !! we are carrying information about these probably don’t need info about these University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 10

level 3 DFD University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 11

level 3 DFD University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 12

level 2 DFD University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD

University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 16

real-time extensions Current gauge Line status Line tension Report line status Enable Disable Control line conditions 3. 2 Enable Disable 3. 1 Tension off Tension ok Enable Disable Line tension material inlet 3. 3 Enable Disable KEY name ID Control flow (discrete) Inlet control Current tension Controlling tension Monitor Tension 3. 4 3. 5 Tension settings table Control Transformation Control flow (continuous) name Control Store Tension inlet control Source: Svoboda, C. P. “Structured Analysis”. In Thayer, R. H and Dorfman, M. (eds. ) “Software Requirements Engineering, Second Edition”. IEEE Computer Society Press, 1997, p 255 -274 © Steve Easterbrook University of Toronto at Scarborough © Kersti Wain-Bantin CSCC 40 DFD examples 17

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