35
Interview
can
be
subject
to
bias
if
the
interviewer
has
a
closed
mind
about
the
problem.
If
different
interviewees
provide
conflicting
information,
it
can
be
difficult
to
resolve latter [17].
2.2.2.2.2 Review existing documentation
Reviewing
document
can
help
system
analyst
to
understand
how
the
current
system
is
supposed to work [15].
Advantage of reviewing existing documentation:
Documentation on the existing system may provide formally defined information
requirements for the current system.
Disadvantages of reviewing existing documentation:
If the system
is
going
to change dramatically, existing documents
may
not
reflect
how it will be in the future.
Written
documents
often
do
not
match
up
to
reality;
they
maybe
out
of
date
or
they may reflect the official policy on matters that are dealt with differently in
practice [17].
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