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The
duration
of
the
prototyping
loop
can
be
limited
by
using
a
technique
called
timeboxing.
A
timebox, as said by Whitten
[4],
is a
nonextendable period of
time,
usually 60
to
120 days, by which a candidate system must be placed into operation.
According to Whitten [4], the advantage of using RAD methodology:
1. Useful
when
user
requirements
are
unsure. It
means during the development the
requirements keep changing.
2. RAD involves user participation which gives them an enthusiasm for the project.
3. Projects
have
higher
visibility
and
support
because
of
the
extensive
user
involvement throughout the process.
4. Errors are detected in the earlier phase before going to the implementation.
5. It
reduces
risk
because
RAD
tests
the
technical
solution
iteratively
instead
of
giving the solution only once.
According a quotation from www.21stsoft.com/services- methodologies-rad.asp [20],
the disadvantages of RAD methodology:
1. Unknown cost of product. As mentioned above, this problem can be alleviated by
the customer agreeing to a limited amount of rework in the RAD process.
2. It
may
be
difficult
for
many
important
users
to
commit
the
time
required
for
success of the RAD process.
3. RAD uses effectively on smaller project not bigger one.
2.2.2 The Significant of RAD Approach
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