CHAPTER 2
THEORETICAL FOUNDATION
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2.6.Data Flow Diagram (DFD)
The description on Data Flow Diagram (DFD) would will cover
its
definition,
elements which that composeed the DFD, and the DFD Context, which will be
utilized as the supporting instruments in this thesis.
2.6.1.Definition of DFD
Laudon and
Laudon
(2004,
p.
467)
define
DFD
as primary
tool
for structured
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analysis that graphically illustrates a system’s component processes and the flow
of
data between
them.
Another
identification
for
DFD
is
that
it
is
a
graphical
description of the source and destination of data that shows data flow within an
organization, the processes performed on the data, and how data are stored
(Romney & Steinbart 2006, p. 62). It is also defined as a graphic representation
of
a
system
that
uses
a
small
number
of symbol
shapes
to
illustrate
how
data
flows through interconnected processes (McLeod & Schell 2001, p. 401).
2.6.2.Elements of DFD
Romney and Steinbart (2006, p. 63) state that a DFD is composed of four basic
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elements, as depicted in Figure 2.3::
DData Sources and Destinations.
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