Hey there! Sign in to join this conversationNew here? Join for free
    • Thread Starter
    Offline

    2
    ReputationRep:
    I'm supposed to be doing a DFD for a real time system of my choice (I chose a Cash Point (ATM)). So - showing all the inputs to the system, all the processes involved and all the outputs.

    I've started it, using the symbols she wanted us to use, eg: Circle for process, Recntangle for Entity. But it's already getting really messy with arrows all over the place, so I'm sure I must be doing it wrong.

    Click spoiler for overcrowed DFD:

    Spoiler:
    Show




    How am I supposed to be laying it out, so that it doesn't get so overcrowded with arrows all over the place? I've not done one of these diagrams before...

    Thanks.
    Offline

    2
    ReputationRep:
    Stop using curly arrows.
    Offline

    19
    ReputationRep:
    Yeah just needs tidying up a bit.

    When I was learning these we did them landscape with the processes left to right & the data going up and down.

    PS drawing cash will affect the balance & obv there's other stuff like checking the amount can be dispensed using the notes that are left in the machines hoppers - cos you'll get fired if more money comes out of people accounts than your software is actually giving them.
    Offline

    0
    ReputationRep:
    Hi,
    Do you use any software to draw DFD diagrams? I will recommend you to try Microsoft Visio 2010 for creating DFD diagrams. It is very easy to use and has great features. Hope this will help you.
 
 
 
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • Poll
    Will you be richer or poorer than your parents?
  • See more of what you like on The Student Room

    You can personalise what you see on TSR. Tell us a little about yourself to get started.

  • The Student Room, Get Revising and Marked by Teachers are trading names of The Student Room Group Ltd.

    Register Number: 04666380 (England and Wales), VAT No. 806 8067 22 Registered Office: International House, Queens Road, Brighton, BN1 3XE

    Quick reply
    Reputation gems: You get these gems as you gain rep from other members for making good contributions and giving helpful advice.