Data Flow Analysis


·         What processes make up the system?
·         What data are used in each process?
·         What data are stored?
·         What data enter and leave the system?
·         Entire emphasis is on the data analysis as can be seen from the previous question.
·         Following the flow of data through business processes tells analyst a great deal about how organization objectives are accomplished.
·          In the course of handling transactions and completing task data are input, processed, stored, retrieved, used, changed and output.
·         Data Flow Analysis studies the use of data in each activity.
·         It documents these findings in dataflow diagrams which graphically shows the relation between processes and data and in data dictionary describes the system data and where they are stored.

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Symbol Used In Data Flow Diagram (DFD)

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