system design - DSpace at CUSAT - Cochin University of Science ...

PROJECT REPORT Callipers – The Training Manager
He can communicate with his colleagues, with his trainer and also with
the administrator.
He can check his grade and attendance marked by his trainer.
He can also write his complaints about teaching as well as about his
trainer.
He can write his doubts and solutions to the questions in the forum.
5.10 Data Flow Diagram
A Data Flow Diagram is a modeling tool that allows us to picture a
system as a network that describes the flow of data and processes that change, or
transform data throughout the system. DFD is constructed by using a set of
symbols that do not imply a physical implementation.DFD models a system by
using external entities from which data flows to a process, which transfer the data
and creates output-data flows, which go to other external entities or files. The
main merits of DFD is that it can provide an overview of the system requirements,
what data a system would process, what transformation of data are done, what
files are used, and where the results flow.
5.10.1 DFD Design Notations
Square
The Square defines the source or destination of data.
Arrow
The arrow defines the flow of data.
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