Search Results for "computer-systems-reliability"

Computer System Reliability

Computer System Reliability

Safety and Usability

  • Author: B.S. Dhillon
  • Publisher: CRC Press
  • ISBN: 1466573139
  • Category: Computers
  • Page: 249
  • View: 3106
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Computer systems have become an important element of the world economy, with billions of dollars spent each year on development, manufacture, operation, and maintenance. Combining coverage of computer system reliability, safety, usability, and other related topics into a single volume, Computer System Reliability: Safety and Usability eliminates the need to consult many different and diverse sources in the hunt for the information required to design better computer systems. After presenting introductory aspects of computer system reliability such as safety, usability-related facts and figures, terms and definitions, and sources for obtaining useful information on computer system reliability, safety, and usability, the book: Reviews mathematical concepts considered useful to understanding subsequent chapters Presents various introductory aspects of reliability, safety, and usability and computer system reliability basics Covers software reliability assessment and improvement methods Discusses important aspects of software quality and human error and software bugs in computer systems Highlights software safety and Internet reliability Details important aspects of software usability including the need for considering usability during the software development phase, software usability engineering process, software usability inspection methods, software usability test methods, and guidelines for conducting software usability testing Elucidates web usability facts and figures, common design errors, web page design, tools for evaluating web usability, and questions to evaluate website message communication effectiveness Examines important aspects of computer system life cycle costing Written by systems reliability expert B.S. Dhillon, the book is accessible to all levels of readership, making it useful to beginners and seasoned professionals alike. Reflecting practical trends in computer engineering especially in the area of software, Dhillon emphasizes the importance of usability in software systems and expands reliability to web usability and management. It provides methods for designing systems with increased reliability, safety, and usability.

Reliability of Computer Systems and Networks

Reliability of Computer Systems and Networks

Fault Tolerance, Analysis, and Design

  • Author: Martin L. Shooman
  • Publisher: John Wiley & Sons
  • ISBN: 0471464066
  • Category: Technology & Engineering
  • Page: 552
  • View: 5764
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With computers becoming embedded as controllers in everything from network servers to the routing of subway schedules to NASA missions, there is a critical need to ensure that systems continue to function even when a component fails. In this book, bestselling author Martin Shooman draws on his expertise in reliability engineering and software engineering to provide a complete and authoritative look at fault tolerant computing. He clearly explains all fundamentals, including how to use redundant elements in system design to ensure the reliability of computer systems and networks. Market: Systems and Networking Engineers, Computer Programmers, IT Professionals.

Computing System Reliability

Computing System Reliability

Models and Analysis

  • Author: Min Xie,Kim-Leng Poh,Yuan-Shun Dai
  • Publisher: Springer Science & Business Media
  • ISBN: 0306486369
  • Category: Mathematics
  • Page: 293
  • View: 4229
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Computing systems are of growing importance because of their wide use in many areas including those in safety-critical systems. This book describes the basic models and approaches to the reliability analysis of such systems. An extensive review is provided and models are categorized into different types. Some Markov models are extended to the analysis of some specific computing systems such as combined software and hardware, imperfect debugging processes, failure correlation, multi-state systems, heterogeneous subsystems, etc. One of the aims of the presentation is that based on the sound analysis and simplicity of the approaches, the use of Markov models can be better implemented in the computing system reliability.

Computing System Reliability: Models and Analysis

Computing System Reliability: Models and Analysis

  • Author: Min Xie,Yuan-Shun Dai,Kim-Leng Poh
  • Publisher: Springer Science & Business Media
  • ISBN: 030648496X
  • Category: Computers
  • Page: 293
  • View: 4932
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Computing systems are of growing importance because of their wide use in many areas including those in safety-critical systems. This book describes the basic models and approaches to the reliability analysis of such systems. An extensive review is provided and models are categorized into different types. Some Markov models are extended to the analysis of some specific computing systems such as combined software and hardware, imperfect debugging processes, failure correlation, multi-state systems, heterogeneous subsystems, etc. One of the aims of the presentation is that based on the sound analysis and simplicity of the approaches, the use of Markov models can be better implemented in the computing system reliability.

Reliable Computer Systems

Reliable Computer Systems

Design and Evaluatuion

  • Author: Daniel Siewiorek,Robert Swarz
  • Publisher: Digital Press
  • ISBN: 1483297438
  • Category: Computers
  • Page: 908
  • View: 3941
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Enhance your hardware/software reliability Enhancement of system reliability has been a major concern of computer users and designers ¦ and this major revision of the 1982 classic meets users' continuing need for practical information on this pressing topic. Included are case studies of reliable systems from manufacturers such as Tandem, Stratus, IBM, and Digital, as well as coverage of special systems such as the Galileo Orbiter fault protection system and AT&T telephone switching processors.

Reliability in Computer System Design

Reliability in Computer System Design

  • Author: B. S. Dhillon
  • Publisher: Intellect Books
  • ISBN: 9780893914127
  • Category: Computers
  • Page: 282
  • View: 7136
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This volume covers wide areas of interest such as life cycle costing, microcomputers, common-cause failures and space computers. Every effort is made to present difficult material with the aid of an example along with its solution. The material covered is summarized at the end of each chapter. The information is written in a format that allows readers to learn and better understand the philosophy of reliability in computer system design. At the same time, it tests their comprehension through listed exercises.

Reliable Computer Systems

Reliable Computer Systems

Collected Papers of the Newcastle Reliability Project

  • Author: Santosh Shrivastava
  • Publisher: Springer Science & Business Media
  • ISBN: 3642824706
  • Category: Computers
  • Page: 580
  • View: 8749
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A research project to investigate the design and construction of reliable computing systems was initiated by B. Randell at the University of Newcastle upon Tyne in 1972. In over ten years of research on system reliability, a substantial number of papers have been produced by the members of this project. These papers have appeared in a variety of journals and conference proceedings and it is hoped that this book will prove to be a convenient reference volume for research workers active in this important area. In selecting papers published by past and present members of this project, I have used the following criteria: a paper is selected if it is concerned with fault tolerance and is not a review paper and was published before 1983. I have used these criteria (with only one or two exceptions!) in order to present a collection of papers with a common theme and, at the same time, to limit the size of the book to a reasonable length. The papers have been grouped into seven chapters. The first chapter introduces fundamental concepts of fault tolerance and ends with the earliest Newcastle paper on reliability. The project perhaps became well known after the invention of recovery blocks - a simple yet effective means of incorporating fault tolerance in software. The second chapter contains papers on recovery blocks, starting with the paper which first introduced the concept.

Computer Systems Reliability

Computer Systems Reliability

  • Author: Tom Anderson,Brian Randell
  • Publisher: CUP Archive
  • ISBN: 9780521227674
  • Category: Computers
  • Page: 482
  • View: 9806
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Performance and Reliability Analysis of Computer Systems

Performance and Reliability Analysis of Computer Systems

An Example-Based Approach Using the SHARPE Software Package

  • Author: Robin A. Sahner,Kishor Trivedi,Antonio Puliafito
  • Publisher: Springer Science & Business Media
  • ISBN: 1461523672
  • Category: Computers
  • Page: 404
  • View: 4455
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Performance and Reliability Analysis of Computer Systems: An Example-Based Approach Using the SHARPE Software Package provides a variety of probabilistic, discrete-state models used to assess the reliability and performance of computer and communication systems. The models included are combinatorial reliability models (reliability block diagrams, fault trees and reliability graphs), directed, acyclic task precedence graphs, Markov and semi-Markov models (including Markov reward models), product-form queueing networks and generalized stochastic Petri nets. A practical approach to system modeling is followed; all of the examples described are solved and analyzed using the SHARPE tool. In structuring the book, the authors have been careful to provide the reader with a methodological approach to analytical modeling techniques. These techniques are not seen as alternatives but rather as an integral part of a single process of assessment which, by hierarchically combining results from different kinds of models, makes it possible to use state-space methods for those parts of a system that require them and non-state-space methods for the more well-behaved parts of the system. The SHARPE (Symbolic Hierarchical Automated Reliability and Performance Evaluator) package is the `toolchest' that allows the authors to specify stochastic models easily and solve them quickly, adopting model hierarchies and very efficient solution techniques. All the models described in the book are specified and solved using the SHARPE language; its syntax is described and the source code of almost all the examples discussed is provided. Audience: Suitable for use in advanced level courses covering reliability and performance of computer and communications systems and by researchers and practicing engineers whose work involves modeling of system performance and reliability.

Design for Reliability

Design for Reliability

Information and Computer-Based Systems

  • Author: Eric Bauer
  • Publisher: John Wiley & Sons
  • ISBN: 9781118075081
  • Category: Computers
  • Page: 325
  • View: 5737
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System reliability, availability and robustness are often not well understood by system architects, engineers and developers. They often don't understand what drives customer's availability expectations, how to frame verifiable availability/robustness requirements, how to manage and budget availability/robustness, how to methodically architect and design systems that meet robustness requirements, and so on. The book takes a very pragmatic approach of framing reliability and robustness as a functional aspect of a system so that architects, designers, developers and testers can address it as a concrete, functional attribute of a system, rather than an abstract, non-functional notion.

Beyond Redundancy

Beyond Redundancy

How Geographic Redundancy Can Improve Service Availability and Reliability of Computer-Based Systems

  • Author: Eric Bauer,Randee Adams,Daniel Eustace
  • Publisher: John Wiley & Sons
  • ISBN: 9781118104934
  • Category: Computers
  • Page: 336
  • View: 1380
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How Geographic Redundancy Can Improve Service Availability and Reliability of Computer-Based Systems Enterprises make significant investments in geographically redundant systems to mitigate the very unlikely risk of a natural or man-made disaster rendering their primary site inaccessible or destroying it completely. While geographic redundancy has obvious benefits for disaster recovery, it is far less obvious what benefit georedundancy offers for more common hardware, software, and human failures. Beyond Redundancy provides both a theoretical and practical treatment of the feasible and likely benefits from geographic redundancy for both service availability and service reliability. The book is organized into three sections: Basics provides the necessary background on georedundancy and service availability Modeling and Analysis of Redundancy gives the technical and mathematical details of service availability modeling of georedundant configurations Recommendations offers specific recommendations on architecture, requirements, design, testing, and analysis of georedundant configurations A complete georedundant case study is included to illustrate the recommendations. The book considers both georedundant systems and georedundant solutions. The text also provides a general discussion about the capital expense/operating expense tradeoff that frames system redundancy and georedundancy. These added features make Beyond Redundancy an invaluable resource for network/system planners, IS/IT personnel, system architects, system engineers, developers, testers, and disaster recovery/business continuity consultants and planners.

Mathematical Models for Systems Reliability

Mathematical Models for Systems Reliability

  • Author: Benjamin Epstein,Ishay Weissman
  • Publisher: CRC Press
  • ISBN: 9781420080834
  • Category: Mathematics
  • Page: 272
  • View: 3300
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Evolved from the lectures of a recognized pioneer in developing the theory of reliability, Mathematical Models for Systems Reliability provides a rigorous treatment of the required probability background for understanding reliability theory. This classroom-tested text begins by discussing the Poisson process and its associated probability laws. It then uses a number of stochastic models to provide a framework for life length distributions and presents formal rules for computing the reliability of nonrepairable systems that possess commonly occurring structures. The next two chapters explore the stochastic behavior over time of one- and two-unit repairable systems. After covering general continuous-time Markov chains, pure birth and death processes, and transitions and rates diagrams, the authors consider first passage-time problems in the context of systems reliability. The final chapters show how certain techniques can be applied to a variety of reliability problems. Illustrating the models and methods with a host of examples, this book offers a sound introduction to mathematical probabilistic models and lucidly explores how they are used in systems reliability problems.

Computer system reliability

Computer system reliability

  • Author: Roy Longbottom
  • Publisher: John Wiley & Sons
  • ISBN: N.A
  • Category: Computers
  • Page: 321
  • View: 2306
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Practical Design of Safety-critical Computer Systems

Practical Design of Safety-critical Computer Systems

  • Author: William R. Dunn
  • Publisher: William Dunn
  • ISBN: N.A
  • Category: Automatic control
  • Page: 358
  • View: 2172
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Robust Communications Software

Robust Communications Software

Extreme Availability, Reliability and Scalability for Carrier-Grade Systems

  • Author: Greg Utas
  • Publisher: John Wiley & Sons
  • ISBN: 0470011785
  • Category: Technology & Engineering
  • Page: 352
  • View: 1104
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Learn how to design scalable, robust software for cutting-edge communications productsâ?¦ Carrier-grade software must satisfy the stringent quality requirements of network operators whose systems provide mission-critical communications services. This book describes proven carrier-grade software techniques used in flagship products designed by industry leaders such as Lucent, Nortel, and Ericsson. In the age of 24/7, software robustness is a competitive advantage. This authoritative guide for software engineers, managers, and testers of products that face carrier-grade requirements helps you to develop state-of-the-art software that will give you an edge in todayâ??s marketplace. Robust Communications Software: Extreme Availability, Reliability and Scalability for Carrier-Grade Systems offers advice on choosing the right technologies for building reliable software incorporates real-world examples and design rationales when describing how to construct robust, embedded software for communications systems presents a comprehensive set of carrier-grade design patterns that help you to meet extreme availability, reliability, scalability, and capacity requirements gives advice on how to protect against and recover from software faults discusses system installation, operability, maintenance, and on-site debugging

Engineering Systems Reliability, Safety, and Maintenance

Engineering Systems Reliability, Safety, and Maintenance

An Integrated Approach

  • Author: B.S. Dhillon
  • Publisher: CRC Press
  • ISBN: 1351662708
  • Category: Technology & Engineering
  • Page: 298
  • View: 4498
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Today, engineering systems are an important element of the world economy and each year billions of dollars are spent to develop, manufacture, operate, and maintain various types of engineering systems around the globe. Many of these systems are highly sophisticated and contain millions of parts. For example, a Boeing jumbo 747 is made up of approximately 4.5 million parts including fasteners. Needless to say, reliability, safety, and maintenance of systems such as this have become more important than ever before.? Global competition and other factors are forcing manufacturers to produce highly reliable, safe, and maintainable engineering products. Therefore, there is a definite need for the reliability, safety, and maintenance professionals to work closely during design and other phases. Engineering Systems Reliability, Safety, and Maintenance: An Integrated Approach eliminates the need to consult many different and diverse sources in the hunt for the information required to design better engineering systems.

Systems Reliability and Failure Prevention

Systems Reliability and Failure Prevention

  • Author: Herbert Hecht
  • Publisher: Artech House
  • ISBN: 9781580537957
  • Category: Technology & Engineering
  • Page: 230
  • View: 7753
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This timely resource offers you a comprehensive, unified treatment of the techniques and practice of systems reliability and failure prevention, without the use of advanced mathematics. Featuring numerous, in-depth real-world examples, the book distills the authorOCOs many years of practical experience in designing and testing critical systems. The book helps you set reliability requirements for a new product, monitor compliance with these requirements during development and later life cycle phases, account for software failures in an integrated reliability assessment, and allocate a fixed reliability improvement budget to guide decisions by cost considerations and trade-offs."

Railway Safety, Reliability, and Security: Technologies and Systems Engineering

Railway Safety, Reliability, and Security: Technologies and Systems Engineering

Technologies and Systems Engineering

  • Author: Flammini, Francesco
  • Publisher: IGI Global
  • ISBN: 146661644X
  • Category: Technology & Engineering
  • Page: 487
  • View: 611
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Human errors, as well as deliberate sabotage, pose a considerable danger to passengers riding on the modern railways and have created disastrous consequences. To protect civilians against both intentional and unintentional threats, rail transportation has become increasingly automated. Railway Safety, Reliability, and Security: Technologies and Systems Engineering provides engineering students and professionals with a collection of state-of-the-art methodological and technological notions to support the development and certification of ‘real-time safety-critical’ railway control systems, as well as the protection of rail transportation infrastructures.

Justifying the Dependability of Computer-based Systems

Justifying the Dependability of Computer-based Systems

With Applications in Nuclear Engineering

  • Author: Pierre-Jacques Courtois
  • Publisher: Springer Science & Business Media
  • ISBN: 1848003722
  • Category: Technology & Engineering
  • Page: 323
  • View: 7006
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Safety is a paradoxical system property. It remains immaterial, intangible and invisible until a failure, an accident or a catastrophy occurs and, too late, reveals its absence. And yet, a system cannot be relied upon unless its safety can be explained, demonstrated and certified. The practical and difficult questions which motivate this study concern the evidence and the arguments needed to justify the safety of a computer based system, or more generally its dependability. Dependability is a broad concept integrating properties such as safety, reliability, availability, maintainability and other related characteristics of the behaviour of a system in operation. How can we give the users the assurance that the system enjoys the required dependability? How should evidence be presented to certification bodies or regulatory authorities? What best practices should be applied? How should we decide whether there is enough evidence to justify the release of the system? To help answer these daunting questions, a method and a framework are proposed for the justification of the dependability of a computer-based system. The approach specifically aims at dealing with the difficulties raised by the validation of software. Hence, it should be of wide applicability despite being mainly based on the experience of assessing Nuclear Power Plant instrumentation and control systems important to safety. To be viable, a method must rest on a sound theoretical background.

Transportation Systems Reliability and Safety

Transportation Systems Reliability and Safety

  • Author: B.S. Dhillon
  • Publisher: CRC Press
  • ISBN: 9781439846414
  • Category: Technology & Engineering
  • Page: 236
  • View: 4083
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During day-to-day use, thousands of lives are lost each year due to accidents, directly or indirectly, resulting from poor transportation system reliability and safety. In the United States, automobile accidents alone result in around 42,000 deaths per year, costing billions of dollars to the economy each year. A common subject in journal articles and conference proceedings, most of the recent research on transportation systems reliability and safety is scattered in different resources. Until now. Drawing together the latest research spread throughout the literature, Transportation Systems Reliability and Safety eliminates the need to consult many different and diverse sources to obtain up-to-date information and research. It contains a chapter on mathematical concepts and another chapter on reliability and safety basics that form a foundation for understanding the contents of subsequent chapters. The book also presents a chapter devoted to methods for performing transportation system reliability and safety analysis. It includes a reference section at the end of each chapter for readers who wish to delve deeper into a specific area. The author clearly and concisely covers topics in such a manner that readers require no previous knowledge to understand the concepts. He provides examples and their solutions as well as numerous problems at the end of each chapter to test reader comprehension. The presentation of historical information paired with recent research give readers a foundation for understanding where the field is now and snapshot of where it may be going.