Process for System Architecture and Requirements Engineering (eBook, PDF)

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This is the digital version of the printed book (Copyright © 2000). Derek Hatley and Imtiaz Pirbhai-authors of Strategies for Real-Time System Specification-join with influential consultant Peter Hruschka to present a much anticipated update to their widely implemented Hatley/Pirbhai methods. Process for System Architecture and Requirements Engineering introduces a new approach that is particularly useful for multidisciplinary system development: It applies equally well to all technologies and thereby provides a common language for developers in widely differing disciplines. The Hatley-Pirb...

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Derek Hatley and Imtiaz Pirbhai-authors of Strategies for Real-Time System Specification-join with influential consultant Peter Hruschka to present a much anticipated update to their widely implemented Hatley/Pirbhai methods. Process for System Architecture and Requirements Engineering introduces a new approach that is particularly useful for multidisciplinary system development: It applies equally well to all technologies and thereby provides a common language for developers in widely differing disciplines. The Hatley-Pirbhai-Hruschka approach (H/H/P) has another important feature: the coexistence of the requirements and architecture methods and of the corresponding models they produce. These two models are kept separate, but the approach fully records their ongoing and changing interrelationships. This feature is missing from virtually all other system and software development methods and from CASE tools that only automate the requirements model. System managers, system architects, system engineers, and managers and engineers in all of the diverse engineering technologies will benefit from this comprehensive, pragmatic text. In addition to its models of requirements and architecture and of the development process itself, the book uses in-depth case studies of a hospital monitoring system and of a multidisciplinary groundwater analysis system to illustrate the principles. Compatibility Between the H/H/P Methods and the UML: The Hatley/Pirbhai architecture and requirements methods-described in Strategies for Real-Time System Specification-have been widely used for almost two decades in system and software development. Now known as the Hatley/Hruschka/Pirbhai (H/H/P) methods, they have always been compatible with object-oriented software techniques, such as the UML, by defining architectural elements as classes, objects, messages, inheritance relationships, and so on. In Process for System Architecture and Requirements Engineering, that compatibility is made more specific through the addition of message diagrams, inheritance diagrams, and new notations that go with them. In addition, state charts, while never excluded, are now specifically included as a representation of sequential machines. These additions make definition of the system/software boundary even more straightforward, while retaining the clear separation of requirements and design at the system levels that is a hallmark of the H/H/P methods-not shared by most OO techniques. Once the transition to software is made, the developer is free to continue using the H/H/P methods, or to use the UML or any other software-specific technique.

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Derek J. Hatley is president emeritus of System Strategies, an international consulting and training firm based in Jenison, Michigan. He previously was a Staff Engineer at Smiths Industries, Avionic Systems Division, where he was responsible for systems and software development techniques. At Smiths, he developed the requirements model, managed its first major application, developed an instructional workshop to be given internally and to customers and suppliers, and presented the technique in technical papers at numerous international professional conferences. Retired for 12 years, he now enjoys a more relaxed life-with his wife of 52 years and his grown sons and their families, which include four grandchildren.

Peter Hruschka, a principal of The Atlantic Systems Guild, is based in Aachen, Germany. He is widely regarded as one of the fathers of CASE, and he helped create one of the first tools to implement the Hatley/Pirbhai real-time method. His mission: introducing better quality and higher productivity in system development as a trainer, consultant, and author. He has written more than a dozen books and numerous papers (mostly in German) on software architecture, requirements engineering, and development methods. Peter loves to travel and is often found with his wife, Monika, in some of the most scenic parts of the world, trying to hit little white balls into holes that are far too small.

Imtiaz A. Pirbhai was a principal of Systems Methods, based in Seattle, Washington. During his tenure at the Boeing Commercial Airplane Co., he was responsible for the development of structured methods standards and procedures. He specialized in real-time and general systems development training, utilizing the methods his team at Boeing introduced and developed. He taught and consulted internationally, introducing the methods described in Strategies for Real-Time System Specification (Dorset House, 1987) throughout the world. At the time of his death in 1992, he had begun work on the manuscript for Process for System Architecture and Requirements Engineering, completed by his coauthors Derek Hatley and Peter Hruschka.