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"System level testing is becoming increasingly important. It is
driven by the incessant march of complexity ... which is forcing us
to renew our thinking on the processes and procedures that we apply
to test and diagnosis of systems. In fact, the complexity defines
the system itself which, for our purposes, is ?any aggregation of
related elements that together form an entity of sufficient
complexity for which it is impractical to treat all of the elements
at the lowest level of detail . System approaches embody the
partitioning of problems into smaller inter-related subsystems that
will be solved together. Thus, words like hierarchical, dependence,
inference, model, and partitioning are frequent throughout this
text. Each of the authors deals with the complexity issue in a
similar fashion, but the real value in a collected work such as
this is in the subtle differences that may lead to synthesized
approaches that allow even more progress. The works included in
this volume are an outgrowth of the 2nd International Workshop on
System Test and Diagnosis held in Alexandria, Virginia in April
1998. The first such workshop was held in Freiburg, Germany, six
years earlier. In the current workshop nearly 50 experts from
around the world struggled over issues concerning the subject... In
this volume, a select group of workshop participants was invited to
provide a chapter that expanded their workshop presentations and
incorporated their workshop interactions... While we have attempted
to present the work as one volume and requested some revision to
the work, the content of the individual chapters was not edited
significantly. Consequently, you will see different approaches to
solving the same problems and occasional disagreement between
authors as to definitions or the importance of factors. ... The
works collected in this volume represent the state-of-the-art in
system test and diagnosis, and the authors are at the leading edge
of that science...". From the Preface
System Test and Diagnosis is the first book on test and diagnosis
at the system level, defined as any aggregation of related elements
that together form an entity of sufficient complexity for which it
is impractical to treat all of the elements at the lowest level of
detail. The ideas presented emphasize that it is possible to
diagnose complex systems efficiently. Since the notion of system is
hierarchical, these ideas are applicable to all levels. The
philosophy is presented in the context of a model-based approach,
using the information flow model, that focuses on the information
provided by the tests rather than the functions embedded in the
system. Detailed algorithms are offered for evaluating system
testability, performing efficient diagnosis, verifying and
validating the models, and constructing an architecture for system
maintenance. Several advanced algorithms, not commonly available in
existing diagnosis tools, are discussed, including reasoning with
inexact or uncertain test data, breaking large problems into
manageable smaller problems, diagnosing systems with time sensitive
information and time dependent tests and learning from experience.
The book is divided into three parts. The first part provides
motivation for careful development of the subject and the second
part provides the tools necessary for analyzing system testability
and computing diagnostic strategies. The third part presents
advanced topics in diagnosis. Several case studies are provided,
including a single detailed case study. Smaller case studies
describe experiences from actual applications of the methods
discussed. The detailed case study walks the reader through a
complete analysis of a system to illustrate the concepts and
describe the analyses that are possible. All case studies are based
upon real systems that have been modeled for the purposes of
diagnosis. System Test and Diagnosis is the culmination of nearly
twelve years of research into diagnosis modeling and its
applications. It is designed as a primary reference for engineers
and practitioners interested in system test and diagnosis.
"System level testing is becoming increasingly important. It is
driven by the incessant march of complexity ... which is forcing us
to renew our thinking on the processes and procedures that we apply
to test and diagnosis of systems. In fact, the complexity defines
the system itself which, for our purposes, is Aany aggregation of
related elements that together form an entity of sufficient
complexity for which it is impractical to treat all of the elements
at the lowest level of detail . System approaches embody the
partitioning of problems into smaller inter-related subsystems that
will be solved together. Thus, words like hierarchical, dependence,
inference, model, and partitioning are frequent throughout this
text. Each of the authors deals with the complexity issue in a
similar fashion, but the real value in a collected work such as
this is in the subtle differences that may lead to synthesized
approaches that allow even more progress. The works included in
this volume are an outgrowth of the 2nd International Workshop on
System Test and Diagnosis held in Alexandria, Virginia in April
1998. The first such workshop was held in Freiburg, Germany, six
years earlier. In the current workshop nearly 50 experts from
around the world struggled over issues concerning the subject... In
this volume, a select group of workshop participants was invited to
provide a chapter that expanded their workshop presentations and
incorporated their workshop interactions... While we have attempted
to present the work as one volume and requested some revision to
the work, the content of the individual chapters was not edited
significantly. Consequently, you will see different approaches to
solving the sameproblems and occasional disagreement between
authors as to definitions or the importance of factors. ... The
works collected in this volume represent the state-of-the-art in
system test and diagnosis, and the authors are at the leading edge
of that science...." From the Preface
System Test and Diagnosis is the first book on test and diagnosis
at the system level, defined as any aggregation of related elements
that together form an entity of sufficient complexity for which it
is impractical to treat all of the elements at the lowest level of
detail. The ideas presented emphasize that it is possible to
diagnose complex systems efficiently. Since the notion of system is
hierarchical, these ideas are applicable to all levels. The
philosophy is presented in the context of a model-based approach,
using the information flow model, that focuses on the information
provided by the tests rather than the functions embedded in the
system. Detailed algorithms are offered for evaluating system
testability, performing efficient diagnosis, verifying and
validating the models, and constructing an architecture for system
maintenance. Several advanced algorithms, not commonly available in
existing diagnosis tools, are discussed, including reasoning with
inexact or uncertain test data, breaking large problems into
manageable smaller problems, diagnosing systems with time sensitive
information and time dependent tests and learning from experience.
The book is divided into three parts. The first part provides
motivation for careful development of the subject and the second
part provides the tools necessary for analyzing system testability
and computing diagnostic strategies. The third part presents
advanced topics in diagnosis. Several case studies are provided,
including a single detailed case study. Smaller case studies
describe experiences from actual applications of the methods
discussed. The detailed case study walks the reader through a
complete analysis of a system to illustrate the concepts and
describe the analyses that are possible. All case studies are based
upon real systems that have been modeled for the purposes of
diagnosis. System Test and Diagnosis is the culmination of nearly
twelve years of research into diagnosis modeling and its
applications. It is designed as a primary reference for engineers
and practitioners interested in system test and diagnosis.
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