A Practical, Multidisciplinary Approach
and an Update to the Hatley/Pirbhai Methods
Find out more about the authors, PSARE, and systems engineering at www.psare.com!
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/Hruschka/Pirbhai 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's patient-monitoring system
and of a multidisciplinary groundwater analysis system to illustrate the
principles.
** INTRODUCTION **
'The overall purpose of this book is to present a broad approach to the
effective development of systems, especially those involving multiple
disciplines -- as most systems do. We use a variety of practical,
real-world case studies to illustrate the nature of systems and the
system development process, and we include system models that can be used
in the process.
'The book builds on the methods and techniques originally described in
Strategies for Real-Time System Specification [see ISBN: 0-932633-11-0].
It is based on more than a decade of experience, our own and many
others', in the practical application and teaching of the methods and
techniques. . . .
'The wide acceptance of the methods -- which have become known as the
Hatley/Pirbhai methods-has been gratifying, but not all practitioners
have used them correctly or effectively. . . . Our goal, then, is to
share the benefit of our experiences, good and bad, in the hope of
improving the overall state of system development and the methods and
tools that support it.'
** TABLE OF CONTENTS **
Part I: Concepts
1: Introduction
2: What Is a System?
3: A Framework for Modeling Systems
Exploiting System Hierarchies
4: System Development Models
Requirements/Architecture Relationships
A Note on Object Orientation
5: The System Development Process
Process, Methods, and Tools
6: Applying the Models to Development
The Generic Development Structure
Hospital Monitoring System
Completing the Architecture
Numerous Hardware Technologies
7: System Development Overview
A Requirements Model for System Development
A Metamodel for a Development Project
Part II: Case Study -- Groundwater Analysis System
8: Initial Problem Statement
Required Capabilities
9: Fitting In the Known Pieces
System Entity/Relationship/Attribute Model
10: Building Upon the Known Pieces
Enhancing the Essential Model
11: Filling In the Blanks
Adding the Architecture Flows and Interconnects
Merging the Top-Down and Bottom-Up Pieces
12: Completing the Models
Requirements and Architecture Dictionaries
13: Groundwater Analysis System Summary
Appendix: Changes, Improvements, and Misconceptions Since the Methods'
Introduction
** AUTHOR INFORMATION **
Derek J. Hatley, formerly of Smiths Industries, is president of System
Strategies, an international consulting and training firm based in
Jenison, Michigan.
Peter Hruschka is a principal of the Atlantic Systems Guild. Based in
Aachen, Germany, he helped create one of the first tools to implement the
Hatley/Pirbhai real-time method.
At the time of his death in 1992, Imtiaz A. Pirbhai had begun work on a
book of case studies now incorporated into Process for System
Architecture and Requirements Engineering.
