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Software Architecture in Practice (2nd Edition), by Len Bass, Paul Clements, Rick Kazman
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This award-winning book, substantially updated to reflect the latest developments in the field, introduces the concepts and best practices of software architecture--how a software system is structured and how that system's elements are meant to interact. Distinct from the details of implementation, algorithm, and data representation, an architecture holds the key to achieving system quality, is a reusable asset that can be applied to subsequent systems, and is crucial to a software organization's business strategy.
Drawing on their own extensive experience, the authors cover the essential technical topics for designing, specifying, and validating a system. They also emphasize the importance of the business context in which large systems are designed. Their aim is to present software architecture in a real-world setting, reflecting both the opportunities and constraints that companies encounter. To that end, case studies that describe successful architectures illustrate key points of both technical and organizational discussions.
Topics new to this edition include:
- Architecture design and analysis, including the Architecture Tradeoff Analysis Method (ATAM)
- Capturing quality requirements and achieving them through quality scenarios and tactics
- Using architecture reconstruction to recover undocumented architectures
- Documenting architectures using the Unified Modeling Language (UML)
- New case studies, including Web-based examples and a wireless Enterprise JavaBeans™ (EJB) system designed to support wearable computers
- The financial aspects of architectures, including use of the Cost Benefit Analysis Method (CBAM) to make decisions
If you design, develop, or manage the building of large software systems (or plan to do so), or if you are interested in acquiring such systems for your corporation or government agency, use Software Architecture in Practice, Second Edition, to get up to speed on the current state of software architecture.
- Sales Rank: #1067821 in Books
- Published on: 2003-04-19
- Original language: English
- Number of items: 1
- Dimensions: 9.50" h x 1.32" w x 6.50" l, 2.50 pounds
- Binding: Hardcover
- 560 pages
From the Back Cover
This award-winning book, substantially updated to reflect the latest developments in the field, introduces the concepts and best practices of software architecture--how a software system is structured and how that system's elements are meant to interact. Distinct from the details of implementation, algorithm, and data representation, an architecture holds the key to achieving system quality, is a reusable asset that can be applied to subsequent systems, and is crucial to a software organization's business strategy.
Drawing on their own extensive experience, the authors cover the essential technical topics for designing, specifying, and validating a system. They also emphasize the importance of the business context in which large systems are designed. Their aim is to present software architecture in a real-world setting, reflecting both the opportunities and constraints that companies encounter. To that end, case studies that describe successful architectures illustrate key points of both technical and organizational discussions.
Topics new to this edition include:
Architecture design and analysis, including the Architecture Tradeoff Analysis Method (ATAM) Capturing quality requirements and achieving them through quality scenarios and tactics Using architecture reconstruction to recover undocumented architectures Documenting architectures using the Unified Modeling Language (UML) New case studies, including Web-based examples and a wireless Enterprise JavaBeans™ (EJB) system designed to support wearable computers The financial aspects of architectures, including use of the Cost Benefit Analysis Method (CBAM) to make decisions If you design, develop, or manage the building of large software systems (or plan to do so), or if you are interested in acquiring such systems for your corporation or government agency, use Software Architecture in Practice, Second Edition, to get up to speed on the current state of software architecture.
0321154959B03262003
About the Author
Len Bass is a senior member of the technical staff at the Software Engineering Institute (SEI). He has written or edited five books and numerous papers on software engineering and other topics. He has extensive experience in architecting real-world development projects.
Paul Clements is a senior member of the technical staff at the SEI, where he works on software architecture and product line engineering. He is the author of five books and more than three dozen papers on these and other topics.
Rick Kazman is a senior member of the technical staff at the SEI. He is also an Associate Professor at the University of Hawaii. He is the author of two books, editor of two more, and has written more than seventy papers on software engineering and related topics.
Excerpt. � Reprinted by permission. All rights reserved.
Our goals for the first edition were threefold. First, we wanted to show through authentic case studies actual examples of software architectures solving real-world problems. Second, we wanted to establish and show the strong connection between an architecture and an organization's business goals. And third, we wanted to explain the importance of software architecture in achieving the quality goals for a system.
Our goals for this second edition are the same, but the passage of time since the writing of the first edition has brought new developments in the field and new understanding of the important underpinnings of software architecture. We reflect the new developments with new case studies and the new understanding both through new chapters and through additions to and elaboration of the existing chapters.
Architecture analysis, design, reconstruction, and documentation have all had major developments since the first edition. Architecture analysis has developed into a mature field with industrial-strength methods. This is reflected by a new chapter about the architecture tradeoff analysis method (ATAM). The ATAM has been adopted by industrial organizations as a technique for evaluating their software architectures.
Architecture design has also had major developments since the first edition. The capturing of quality requirements, the achievement of those requirements through small-scale and large-scale architectural approaches (tactics and patterns, respectively), and a design method that reflects knowledge of how to achieve qualities are all captured in various chapters. Three new chapters treat understanding quality requirements, achieving qualities, and the attribute driven design (ADD) method, respectively.
Architecture reconstruction or reverse engineering is an essential activity for capturing undocumented architectures. It can be used as a portion of a design project, an analysis project, or to provide input into a decision process to determine what to use as a basis for reconstructing an existing system. In the first edition, we briefly mentioned a tool set (Dali) and its uses in the re-engineering context; in in this edition the topic merits its own chapter.
Documenting software architectures is another topic that has matured considerably in the recent past. When the first edition was published, the Unified Modeling Language (UML) was just arriving on the scene. Now it is firmly entrenched, a reality reflected by all-new diagrams. But more important, an understanding of what kind of information to capture about an architecture, beyond what notation to use, has emerged. A new chapter covers architecture documentation.
The understanding of the application of software architecture to enable organizations to efficiently produce a variety of systems based on a single architecture is summarized in a totally rewritten chapter on software product lines. The chapter reinforces the link between architecture and an organization's business goals, as product lines, based around a software architecture, can enable order-of-magnitude improvements in cost, quality, and time to market.
In addition to the architectural developments, the technology for constructing distributed and Web-based systems has become prominent in today's economy. We reflect this trend by updating the World Wide Web chapter, by using Web-based examples for the ATAM chapter and the chapter on building systems from components, by replacing the CORBA case study with one on Enterprise JavaBeans (EJB), and by introducing a case study on a wireless EJB system designed to support wearable computers for maintenance technicians.
Finally, we have added a chapter that looks more closely at the financial aspects of architectures. There we introduce a method--the CBAM--for basing architectural decisions on economic criteria, in addition to the technical criteria that we had focused on previously.
As in the first edition, we use the architecture business cycle as a unifying motif and all of the case studies are described in terms of the quality goals that motivated the system design and how the architecture for the system achieves those quality goals.
In this edition, as in the first, we were very aware that our primary audience is practitioners, so we focus on presenting material that has been found useful in many industrial applications, as well as what we expect practice to be in the near future.
We hope that you enjoy reading it at least as much as we enjoyed writing it.
0321154959P12162002
Most helpful customer reviews
34 of 40 people found the following review helpful.
A Bible for Software Architects
By Amazon Customer
Being a Software Architect, I can certainly appreciate the work that the authors of this book (L. Bass, P. Clements, R Kazman) have put into this book. Software Architecture in Practice is probably the best book that I have read on the theory and practice of architecture design and software engineering. There is no fair way for me to review this book as it is PACKED with useful information from beginning to the very end. It has a combination of high-level architectural concepts tailored with best software engineering practices. It is not a complete book on software engineering, but it wasn't meant to be - it's meant to cover a very specific topic in software engineering and it does so extremely well. It is a text in which the concepts architecting software applications, evaluating architectures thru various methods, and case studies of major leaps in software architecture have been very well described; depicted and well evaluated. The book is written from an architect's point of view, and it shows how an architect or a group of architects can make or break an organization, and what they need to do in order to be successful. The authors of this book explain why simply architecting something is not good enough and lots of work needs to be done before and after the architectural phase to ensure the quality and the success of the project. This aspect of the book is simply priceless.
The author start by describing software architecture as:
"The Software Architecture of a program or computing system is the structure or structures of the system, which compromise software elements, the externally visible properties of those elements, and the relationships between them."
Throughout the book, the author used this definition to describe various aspects of architecture. One of the methods/techniques that the author uses is called the Architecture Business Cycle (ABC). ABC is method of realizing the "things" that influence the architect and in-turn the architecture - known as the circle of influences. This concept, ABC, is used for all the case studies mentioned in this book:
� A case study on a system that have extreme safety requirements - the Air traffic control.
� A case study on a system with high level of distribution of its subsystems - A flight simulator
� A case study in which it was essential for the organization to be able to share documents instantaneously.
� A case study on an organization where one architecture lead to a product line of applications
� A case study on the need to standardization of architectural approaches across organizations and the community - J2EE and the EJB.
For each case study, the authors depict its ABC and give the reader the reason, business reason, that this project got started to begin with. The reader then walks thru a series of decision-making steps that led to the architecture that was finally chosen. The drivers of the project, the business reason, the architect[s], and the organization are all linked and the authors go into a GREAT DETAIL on how this link can influence the final design.
Architecture Tradeoff Analysis Method or ATAM is a new topic that is added to the second edition of the book. ATAM is a structured method of evaluating architectures.
"It results in a list of risks that the architecture will not meet its business goals"
The authors start by describing the roles and responsibilities of people involved in ATAM, and the output artifacts that ATAM will produce when completed:
� A Concise presentation of the Architecture
� Articulation of the business goals
� Quality requirements in terms of collection of scenarios
� Mapping of architectural decisions to quality requirements
� A set of identified sensitivity and tradeoff points
� A set of risks and non-risks
� A set of risk themes.
The process of ATAM is depicted next in which there are a total of 4 phases:
1) Partnership and preparation: the key project decision makers informally meet to work out the details of the ATAM process.
2) Evaluation phase - the long evaluation process of the architecture with the same project decision makers as in previous phase
3) Evaluation phase, continued - this time the stakeholders are present
4) Follow up - the stakeholders and the evaluation team meets again to follow up.
The process is described very well and examples forms are shown in the book that can be used for your evaluation process. The great thing about this chapter and how it's written is the way that the ATAM process is presented. It is almost like a checklist that the architects need to follow. Very easy to read and follow. The inputs of every phase are clearly identified, and the description of the output is depicted rather clearly. The chapter ends with yet another case study that shows the "theory" just presented. The authors close the chapters by having the following comments about this book:
� ATAM is not an evaluation of Requirements, but only the architecture
� ATAM is not a code evaluation
� ATAM does not actually involved system testing
� ATAM is not a practice instrument, but identifies possible areas of risk within the architecture.
The ATAM is followed by another very well written topic on CBAM (Cost Benefit Analysis Method). This chapter is also new in this edition, but I will leave the details of this chapter for the reader. I like the ATAM method more than the CBAM, because it seems simpler to me.
All and all, the authors in this book did a fantastic job in writing this book. This book is packed with useful information for architects, project leads, and even technical managers.
15 of 17 people found the following review helpful.
Good software architecture book
By Erik Gfesser
My recent software engineering graduate course on software architecture relied mainly on this SEI text, along with several of the many SEI white papers posted on the SEI site, and such texts as Buschmann's Pattern Oriented Software Architecture (POSA) and Stelting/Maassen's Applied Java Patterns. Since the second edition of the text was available just two weeks after the start of the course, I decided not to purchase the first edition, and instead purchased the second edition. However, having used both editions for the course, I must say that the second edition is superior to the first even when only taking the architectural view notation into account (it uses UML rather than a cryptic, proprietary notation used in the first edition, although at this high of a level in modeling, UML sometimes disappoints as well). The addition of content from some SEI white papers to the text is also a benefit of the second edition. The text, regardless of the edition, is well written and very understandable.
8 of 9 people found the following review helpful.
Soon to appear in an undergraduate software course...
By Kris L. Holt
The second edition of the book makes a good journeyman's guidebook, which the first edition didn't since software architecture was still a mystique. The second edition, which has been heavily revamped, makes it clear that software architecture is a mature discipline.
I used the first edition, along with SEI technical papers in a graduate-level software architecture introductory course. After reading the first edition, I still wasn't sure what a software architect should do. The second edition makes it clear. I think a lot of the technical papers that I read are now chapters in the book. Some new chapters are simply great: Understanding Quality Attributes, Achieving Qualities, Designing the Architecture, Documenting Software Architectures, the ATAM, and the CBAM.
I really liked the replacement of ADL with UML, the de facto standard, with all of its warts and blemishes.
For criticism, this book was history as soon as it hit the presses. You'd still need to read SEI technical papers to be current. One of the chapters discusses the performance problems with remote entity beans and makes no reference to EJB 2.0 spec local entity beans with no performance hit on every cross-bean call. Likewise, the final chapter on "The Future" wasn't so bold as to prognosticate on OMG's current work on MDA, but they may be alluding to it with "Moving from architecture to code."
Still more fun to read than a harlequin romance novel and readable in four days.
See all 18 customer reviews...
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