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Fig. 3.3 Stages of STRADIS
methodology
largely oriented toward problem solving (Litan et al.
2011
). On the other hand, it
gives much emphasis to the tools and techniques that should be used to solve a
given situation, instead of simply providing a detailed description of what consti-
tutes each step in the process (Britts
2011
).
Similarly to SSADM, STRADIS is based on a top-down functional analysis
method, where the system is divided into subsystems using graphical representa-
tions, primarily data
flow diagrams (DFDs) (Litan et al.
2011
). These will facilitate
the creation of an outline and overview of the system that is going to be developed.
STRADIS is essentially comprised of four consecutive stages (Britts
2011
),
summarized in Fig.
3.3
. A careful and well-documented analysis of the problem, as
well as existing possibilities and solutions, is the axis that forms this process, hence
STRADIS being considered primarily as a problem-solving methodology. Its main
purpose is evidently to provide a systemic, disciplined guide to approaching a
project.
It can be concluded that this methodology addresses many of the more crucial
issues of IS development, such as costs, advantages, benefits, and a detailed
examination of the system that is being designed and developed. However, user
experience is given a secondary role, as part of the detailed study on the existing
system but with no participatory power. This leads to the consideration that
STRADIS is much more appropriate for situations where the objectives are clear,
but user requirements are uncertain or diffuse (Avison and Taylor
1997
).
3.2.7 Information Engineering (IE)
Information engineering methodology (IEM) is an architectural approach that aims
at providing a framework for planning, evaluating, developing, and implementing
applications within an organization. Its primary goal is to enable an organization to
improve the administration of its resources.
1
IE is
an integrated, full lifecycle systems development approach with automated
tool support
“
”
(Hogan and Raja
1997
), that is particularly useful in introducing
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