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evaluating software architectures, all of which were developed at the
Software Engineering Institute with involvement by the authors. The
methods examined are:
(1) ATAM (Architecture Tradeoff Analysis
Method)
(2) SAAM (Software Architecture Analysis Method)
(3)
ARID (Active Reviews for Intermediate Designs)
Each of the above
address software evaluations in increasing levels of detail, with the
book's main emphasis on ATAM.
What makes this book so valuable is
the fact that you can learn much about developing software
architectures from the criteria with which they are evaluated. For
example, the discussion on quality attributes is eye-opening because
what architects consider to be well formed quality attributes are
usually too vague to properly evaluate, resulting in ill defined
architectures in the first place. Knowing how to evaluate the
architecture will provide the keys for defining a solid architecture.
More important is the way the authors define the outputs of the
architecture evaluation, which gives the practicing architect a
framework for design that fully meets the evaluation criteria. The
net result is that a defined architecture will unambiguously
communicate the design to the development team, as well as to the QA
team.
I especially like the business oriented approach that
addresses the costs and benefits of evaluation, the three approaches
from which to choose that best meets technical and business goals, and
the case studies that support each of the approaches. Another strong
point about this book is architecture is also evaluated with
production in mind. Too many books only consider architecture from
the development point of view, or in rare cases, from development and
QA points of view. The evaluation techniques in this book extend to
support and maintenance. The authors make selection of the best
technique easy by comparing them in Chapter 9, and provide an approach
to implement evaluations in Chapter 10.
If you're an architect I also recommend augmenting the excellent
material in this book with Design and Use of Software Architectures by
Jan Bosch , which gives an alternate method to ATAM that is more
complete in many respects. Even if you espouse Bosch's approach,
however, the approach and techniques given in Evaluating Software
Architectures: Methods and Case Studies are complementary. I personally
recommend both books and assign equal value to them.
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Before I started using this book, if I forgot my username or password, I had to register with a site again. I ended up having two or three different accounts at some sites. Also, I had only one or two passwords which I used again and agian. Now I can easily use a different password for each site I belong to.
This book is easy to use and is a fantastic organizational tool. You won't be disappointed.
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