33
"exploded" to show more detail of the system being
modeled
(Satzinger,
JW,
Jackson,
Robert
B,
&
Burd SD
2002). More details for context diagram components are
shown clearly in Figure 2.8. Moreover, the system will
summarizes all processing activities within the system in
single process symbol and connects external entities by
resource
flows and data
flows. This example shows that in
order-entry subsystem have five external agents such as
customer, accounting, management, shipping, and bank. It
links
to
credit
bureau
in
real-time
connection.
Source:
Scanned
from Satzinger,
JW,
Jackson,
Robert
B,
&
Burd SD, 2002,
System
Analysis and Design in Changing World, 2
nd
edn, Thomson Learning, Canada, Page 201.
Figure 2.8 Context Diagram for Order-Entry Subsystem
2.2.3.1.7
Diagram
Level-One DFD
Level one process describes only the main functional
areas
of
the
system.
The
limit
process
for
illustrating
business process diagram is twelve process boxes. In
addition,
this
diagram
identifies
the
main
business
processes
at
high
level.
For
more
details
information,
further- giving
rise
to
a
corresponding
level
two
business
process
diagram
 |