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Book
54 p.
A new formula for the probability of a union of events is used to express the failure probability fo an n-component system. A very simple Monte-Carlo algorithm based on the new probability formula is presented. The input to the algorithm gives the failure probabilities of the n components of the system and a list of the failure sets of the system. The output is an unbiased estimator of the failure probability of the system. We show that the average value of the estimator over many runs of the algorthm tends to converge quickly to the failure Probability of the system. The overall time to estimate the failure probability with high accuracy compares very favorably with the execution times of other methods used for solving this problem.
SAL3 (off-campus storage)
SAL3 (off-campus storage), Special Collections
Book
80 p.
Reliability is an important concern of any computer system. No matter how carefully designed and constructed, computer systems fail. The rapid and systematic restoration of service after an error or malfunction is always a major design and operational goal. In order to overcome the effects of a failure, recovery must be performed to go from the failed sate to an operational state. This thesis describes a recovery method which guarantees that a computer system, its associated data bases and communication transactions will be restored to an operational and consistent state within a given time and cost bound after the occurrence of a system failure.
This thesis considers the optimization of a specific software strategy - the rollback and recovery strategy, within the framework of a graph model of program flow which encompasses communication interfaces and data base transactions. Algorithms are developed which optimize the placement of dynamic recovery checkpoints. Presented is a method for statically pre-computing a set of optimal decision parameters for the associated program model, and run-time technique for dynamically determining the optimal placement of program recovery checkpoints.
SAL3 (off-campus storage), Special Collections
Book
37 p.
The goals of this paper are to present an efficient redundancy scheme for highly reliable systems, to give a method to compute the exact reliability of such schemes and to compare this scheme with other redundancy schemes. This redundancy scheme is self-purging redundancy; a scheme that uses a threshold voter and that purges the failed modules. Switches for self-purging systems are extremely simple: there is no replacement of failed modules and module purging is quite simply implemented. Because of switch simplicity, exact reliability calculations are possible. The effects of switch reliability are quantitatively examined. For short mission times, switch reliability is the most important factor: self-purging systems have a probability of failure several times larger than the figure obtained when switches are assumed to be perfect. The influence of the relative frequency of the diverse types of failures (permanent, intermittent, stuck-at,...) are also investigated. Reliability functions, mission time improvements and switch efficiency are displayed. Self-purging systems are compared with ot her redundant systems, like hybrid or NMR, for their relative merits in reliability gain, simplicity, cost and confidence in the reliability estimation. The high confidence in the reliability evaluation of self-purging systems makes them a standard for the validation of several models that have been proposed to take into account switch reliability. The accuracy of models using coverage factors can be evaluated that way.
SAL3 (off-campus storage), Special Collections
Media & Microtext Center
Book
32 p.
This paper presents a number of methods for finding sequential circuit output probabilities using regular expressions. Various classes of regular expressions, based on their form, are defined and it is shown how to easily find multistep transition probabilities directly from the regular expressions. A new procedure for finding steady state probabilities is given which proceeds either from a regular expression or a state diagram description. This procedure is based on the concept of synchronization of the related machine, and is useful for those problems where synchronization sequences exist. In the cases where these techniques can be utilized, substantial savings in computation can be realized. Further, application to other areas such as multinomial Markov processes is immediate.
SAL3 (off-campus storage), Special Collections
Media & Microtext Center
Book
18p.
SAL3 (off-campus storage), Special Collections
Media & Microtext Center
Book
66 p. : ill ; 18 cm.
  • Chapter 1: What is Reliability? Chapter 2: Basic Concepts Chapter 3: Sampling Chapter 4: Measuring Reliability Chapter 5: Interpreting test results Chapter 6: Improving Reliability Glossary About the author.
  • (source: Nielsen Book Data)9781563273025 20160605
The Basics of Reliability is a handy source for comprehending reliability concepts, interpreting reliability requirements, and understanding reliability reports. The Basics of Reliability explains reliability concepts in a simple and straight-forward language for all employee levels and includes a comprehensive glossary that clearly and thoroughly defines technical terms. Senior management, inspectors, technical sales personnel, product engineers, manufacturing engineers, quality engineers, or anyone responsible for reliability will be able to turn to The Basics of Reliability for quick tips and answers to frequently asked reliability questions.
(source: Nielsen Book Data)9781563273025 20160605
SAL3 (off-campus storage)
Book
xvi, 392 p. : ill. ; 25 cm.
  • I. THE RELIABILITY OBJECTIVE. 1. I Want What I Want When I Want It! 2. Defining Reliability. 3. Computing Reliability Parameters. II. MEASURING AND EVALUATING RELIABILITY. 4. Reliability Predictions. 5. Evaluating Data for Failure Rate Estimation. 6. Graphical Evaluation for Reliability Prediction. 7. Restorability. 8. Reliability Modeling for System Predictions. 9. Reliability Modeling of Complex Systems. 10. System Availability and Dependability. III. RELIABILITY ASSURANCE AND IMPROVEMENT. 11. Reliability and Restorability Demonstration Testing. 12. Reliability Growth Testing. 13. Risk Assessment. 14. Epilogue. Appendix A: Review of Probability and Statistics. Appendix B: Probability Tables. Appendix C: System MTBF and Availability Tables. Index.
  • (source: Nielsen Book Data)9780134858227 20160527
Appropriate for courses in Reliability, Reliability Engineering, and Reliability Engineering and Analysis. * Approaching reliability from the standpoint of applications rather than advanced probability theory and higher mathematics, this text separates the hows from the whys at a level that is relevant to those with only limited technical training as well as those seeking a more analytical framework. Its three-fold presentation (1) describes how reliability is defined and specified; (2) addresses methods of designing reliability; and (3) covers techniques for proving and improving the reliability of a system. * This book is appropriate for engineering and engineering tech programs and features methods for solving reliability of complex systems without complex math.
(source: Nielsen Book Data)9780134858227 20160527
SAL3 (off-campus storage)
Media & Microtext Center
Book
21p.
Media & Microtext Center, SAL3 (off-campus storage), Special Collections
Book
1 online resource : text file, PDF
  • Scope of Reliability-Based Life-Cycle Economical Analysis Background Reliability Engineering Approaches Reliability Engineering Economics Reliability Engineering Analysis Impacts on Life-Cycle Costs Reliability Analysis for Part Design Failure Criticality Items List and Database Proposed Criticality Analysis Procedure Reliability Block Diagram Qualitative Part Failure Analysis Quantitative Failure Analysis Assembly Reliability Functions Fitting Reliability Data to Reliability Math Models Exponential Reliability Math Models Weibull Reliability Math Models Qualitative Maintainability Analysis Quantitative Maintainability Analysis System Logistics Downtime Math Model Summary of Reliability Math Models Availability Application of Reliability Math Models Reliability Analysis for System Sustainment Baseline Reliability Analysis Failure Report, Analysis, Corrective Action System-FRACAS Prerepair Logistics Downtime Postrepair Logistics Downtime Quantitative Reliability Analysis Exponential Reliability Math Models Weibull Reliability Math Models Quantitative Maintainability Analysis Mean Maintenance Time Mean Downtime System Logistics Downtime Math Model Summary of Reliability Math Models Availability Application of Reliability Math Models Engineering Economic Analysis Engineering Economic Analysis Information Fundamental Economic Concepts Amounts versus Equivalent Value Cost Estimation Classifications of Sources and Uses of Estimated Cash Cash Flow Timeline Equivalent Values Example 1: Project Cash Flow Timeline: m = Example 2: Project Cash Flow Timeline: m = Example 3: Project Cash Flow Timelines for Three Projects: m = Example 4: Project Cash Flow Timelines for Three Projects: m = Application to Reliability Based Life-Cycle Economic Analysis Reliability-Based Logistical Economic Analysis Failure Math Model Repair Math Model Logistics Downtime Math Model Impact of Preventive Maintenance on Logistics Downtime Special Cause Variability in Logistics Downtime Cost Objective Function Spare Parts Acquisition Strategies Specialty Tools Cash Flow Timeline Life-Cycle Economic Analysis Selection Cautionary Note Preventive Maintenance Life-Cycle Simulation Approach System Reliability Analysis Spare Parts Strategy Standby Design Configuration Reliability-Centered Maintenance Choosing the Correct Maintenance Plan RCM Challenges RCM Benefits Reliability Database Segment 1: Criticality Analysis Segment 2: Qualitative Failure Analysis Segment 3: Quantitative Failure Analysis Segment 4: Quantitative Repair Analysis Segment 5: Pre-Repair Logistics Downtime Quantitative Analysis Segment 6: Post-Repair Logistics Downtime Quantitative Analysis Segment 7: Spare Part Strategy Reliability Simulation and Analysis Reliability Simulations Assembly and System Simulations Summary A: Reliability Failure Math Models and Reliability Functions Exponential Reliability Math Modeling Approach Weibull Reliability Math Modeling Approach B: Maintainability Math Models and Maintainability Functions Time-to-Repair Math Model, Log-Normal Distribution Approach Time-to-Repair Math Model, Weibull Distribution Approach Comparison between the Log-Normal and Weibull Approach Logistics Downtime Functions Engineering Economics Functions Cost Estimation: Present Amount Cost Estimation: Future Amount Equivalent Present Value: Future Amount Cost Estimation: Uniform Recurring Amounts Recurring Amounts with Linear Gradient Recurring Amounts with Geometric Gradient Capital Recovery Sinking Fund Net Present Value and Equivalent Uniform Recurring Amount Less Common Engineering Economics Functions References.
  • (source: Nielsen Book Data)9781482219647 20160619
How Can Reliability Analysis Impact Your Company's Bottom Line? While reliability investigations can be expensive, they can also add value to a product that far exceeds its cost. Affordable Reliability Engineering: Life-Cycle Cost Analysis for Sustainability & Logistical Support shows readers how to achieve the best cost for design development testing and evaluation and compare options for minimizing costs while keeping reliability above specifications. The text is based on the premise that all system sustainment costs result from part failure. It examines part failure in the design and sustainment of fielded parts and outlines a design criticality analysis procedure that reflects system design and sustainment. Achieve the Best Cost for Life-Cycle Sustainment Providing a framework for managers and engineers to develop and implement a reliability program for their organizations, the authors present the practicing professional with the tools needed to manage a system at a high reliability at the best cost. They introduce analytical methods that provide the methodology for integrating part reliability, failure, maintainability, and logistic math models. In addition, they include examples on how to run reliability simulations, highlight tools that are commercially available for such analysis, and explain the process required to ensure a design will meet specifications and minimize costs in the process. This text: * Demonstrates how to use information gathered from reliability investigations * Provides engineers and managers with an understanding of a reliability engineering program so that they can perform reliability analyses * Seeks to resolve uncertainty and establish the value of reliability engineering Affordable Reliability Engineering: Life-Cycle Cost Analysis for Sustainability & Logistical Support focuses on reliability-centered maintenance and is an ideal resource for reliability engineers and managers. This text enables reliability professionals to determine the lowest life-cycle costs for part selection, design configuration options, and the implementation of maintenance practices, as well as spare parts strategies, and logistical resources.
(source: Nielsen Book Data)9781482219647 20160619
Book
1 online resource (456 pages) : illustrations.
Focuses on the core systems engineering tasks of writing, managing, and tracking requirements for reliability, maintainability, and supportability that are most likely to satisfy customers and lead to success for suppliers This book helps systems engineers lead the development of systems and services whose reliability, maintainability, and supportability meet and exceed the expectations of their customers and promote success and profit for their suppliers. This book is organized into three major parts: reliability, maintainability, and supportability engineering. Within each part, there is material on requirements development, quantitative modelling, statistical analysis, and best practices in each of these areas. Heavy emphasis is placed on correct use of language. The author discusses the use of various sustainability engineering methods and techniques in crafting requirements that are focused on the customers needs, unambiguous, easily understood by the requirements stakeholders, and verifiable. Part of each major division of the book is devoted to statistical analyses needed to determine when requirements are being met by systems operating in customer environments. To further support systems engineers in writing, analyzing, and interpreting sustainability requirements, this book also * Contains Language Tips to help systems engineers learn the different languages spoken by specialists and non-specialists in the sustainability disciplines * Provides exercises in each chapter, allowing the reader to try out some of the ideas and procedures presented in the chapter * Delivers end-of-chapter summaries of the current reliability, maintainability, and supportability engineering best practices for systems engineers Reliability, Maintainability, and Supportability is a reference for systems engineers and graduate students hoping to learn how to effectively determine and develop appropriate requirements so that designers may fulfil the intent of the customer.
(source: Nielsen Book Data)9781118858882 20160802
Book
1 online resource (1 v.) : ill.
An Integrated Approach to Product Development Reliability Engineering presents an integrated approach to the design, engineering, and management of reliability activities throughout the life cycle of a product, including concept, research and development, design, manufacturing, assembly, sales, and service. Containing illustrative guides that include worked problems, numerical examples, homework problems, a solutions manual, and class-tested materials, it demonstrates to product development and manufacturing professionals how to distribute key reliability practices throughout an organization. The authors explain how to integrate reliability methods and techniques in the Six Sigma process and Design for Six Sigma (DFSS). They also discuss relationships between warranty and reliability, as well as legal and liability issues. Other topics covered include: * Reliability engineering in the 21st Century * Probability life distributions for reliability analysis * Process control and process capability * Failure modes, mechanisms, and effects analysis * Health monitoring and prognostics * Reliability tests and reliability estimation Reliability Engineering provides a comprehensive list of references on the topics covered in each chapter. It is an invaluable resource for those interested in gaining fundamental knowledge of the practical aspects of reliability in design, manufacturing, and testing. In addition, it is useful for implementation and management of reliability programs.
(source: Nielsen Book Data)9781118140673 20160711
Book
xiv, 364 p. : ill.
  • Maintenance Policies-- Reliability Analysis-- Computer System-- Reliability Applications.
  • (source: Nielsen Book Data)9789814571937 20160612
Reliability modeling has been a major concern for engineers and managers engaged in high quality system designs. This book presents the recent advancement in reliability theory and reliability engineering. Starting from maintenance policies, the book introduces reliability analysis to systems using stochastic processes to study their optimization problems. In this book, the authors will illustrate how these techniques of reliability are applied to solve optimization problems in computer, information and network systems.
(source: Nielsen Book Data)9789814571937 20160612
Book
1 online resource (468 pages) : illustrations
  • Preface xii Acknowledgments xvii 1 Introduction 1 2 Concepts and Requirements 25 3 Failures and Failure Analysis 53 4 Testing and Maintenance 77 5 Reliability Quantification 91 6 Relaiability Data Sources 165 7 Demand Modes and Performance Measures 175 8 Average Probability of Failure on Demand 191 9 Average Frequency of Dangerous Failures 273 10 Common-Cause Failures 309 11 Imperfect Proof-Testing 343 12 Spurious Activation 359 13 Uncertainty Assessment 381 14 Closure 393 Appendix A Elements of Probability Theory 399 Acronyms 423 Symbols 427 Bibliography 431 Index 443.
  • (source: Nielsen Book Data)9781118112724 20160616
Presents the theory and methodology for reliabilityassessments of safety-critical functions through examples from awide range of applications Reliability of Safety-Critical Systems: Theory andApplications provides a comprehensive introduction toreliability assessments of safety-related systems based onelectrical, electronic, and programmable electronic (E/E/PE)technology. With a focus on the design and development phases ofsafety-critical systems, the book presents theory and methodsrequired to document compliance with IEC 61508 and the associatedsector-specific standards. Combining theory and practical applications, Reliability ofSafety-Critical Systems: Theory and Applications implements keysafety-related strategies and methods to meet quantitative safetyintegrity requirements. In addition, the book details a variety ofreliability analysis methods that are needed during all stages of asafety-critical system, beginning with specification and design andadvancing to operations, maintenance, and modification control. Thekey categories of safety life-cycle phases are featured, includingstrategies for the allocation of reliability performancerequirements; assessment methods in relation to design; andreliability quantification in relation to operation andmaintenance. Issues and benefits that arise from complex moderntechnology developments are featured, as well as: * Real-world examples from large industry facilities with majoraccident potential and products owned by the general public such ascars and tools * Plentiful worked examples throughout that provide readers witha deeper understanding of the core concepts and aid in the analysisand solution of common issues when assessing all facets ofsafety-critical systems * Approaches that work on a wide scope of applications and can beapplied to the analysis of any safety-critical system * A brief appendix of probability theory for reference With an emphasis on how safety-critical functions are introducedinto systems and facilities to prevent or mitigate the impact of anaccident, this book is an excellent guide for professionals, consultants, and operators of safety-critical systems who carry outpractical, risk, and reliability assessments of safety-criticalsystems. Reliability of Safety-Critical Systems: Theory andApplications is also a useful textbook for courses inreliability assessment of safety-critical systems and reliabilityengineering at the graduate-level, as well as for consultingcompanies offering short courses in reliability assessment ofsafety-critical systems.
(source: Nielsen Book Data)9781118112724 20160616
Book
xxviii, 334 p. : ill.

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