Download or read book Accelerated Testing and Validation written by Alex Porter and published by Elsevier. This book was released on 2004-07-01 with total page 257 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accelerated Testing and Validation Methods is a cross-disciplinary guide that describes testing and validation tools and techniques throughout the product development process. Alex Porter not only focuses on what information is needed but also on what tools can produce the information in a timely manner. From the information provided, engineers and managers can determine what data is needed from a test and validation program and then how to select the best, most effective methods for obtaining the data.This book integrates testing and validation methods with a business perspective so readers can understand when, where, and how such methods can be economically justified. Testing and validation is about generating key information at the correct time so that sound business and engineering decisions can be made. Rather than simply describing various testing and validation techniques, the author offers readers guidance on how to select the best tools for a particular need, explains the appropriateness of different techniques to various situations and shows how to deploy them to ensure the desired information is accurately gathered. - Emphasizes developing a strategy for testing and validation - Teaches how to design a testing and validation program that deliver information in a timely and cost-effective manner

Download or read book Accelerated testing and validation testing engineering and management tools for lean development written by Alex Porter and published by . This book was released on 2004 with total page 242 pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Accelerated Testing Validation written by and published by . This book was released on 2014 with total page pages. Available in PDF, EPUB and Kindle. Book excerpt:

Download or read book Verification and Validation of Accelerated Testing Methods for Fatigue Life Assessment written by Limin Luo and published by . This book was released on 2017 with total page 22 pages. Available in PDF, EPUB and Kindle. Book excerpt: Fatigue-related durability and reliability performance is one of the most important concerns in many engineering applications, such as for ground vehicles, aircrafts, and power generation systems. Product designers, validation engineers, and manufacturers are under continuous and increasing pressure to reduce the "design cycle" and "time to market" of products while assuring high levels of durability and reliability of these products. To achieve these goals, a number of accelerated testing methods have been developed, with some of them being applied very successfully to engineering applications. Because the ability to assess the fatigue life of an engineering component or system from the accelerated testing results is of great importance, the verification and validation of the accelerated testing methods is becoming critical to properly interpret the predicted results and decision making. In today's highly regulated world, there are many regulations, guidelines, standards, and specifications for conducting accelerated testing, data analysis, and methods verification. However, methods are being continuously revised or enhanced by absorbing more advanced developments to address the fundamental issues or specific needs of a given application, or both. In this paper, two fundamental accelerated testing methods are reviewed and thoroughly investigated: (1) the test-to-failure method and (2) degradation testing. Several key issues are identified in this paper with emphasis on the verification and validation of several new concepts and methodologies. Case studies are provided to demonstrate the critical issues identified.

Download or read book Accelerated Testing written by Ulrich Schulz and published by Vincentz Network GmbH & Co KG. This book was released on 2008-12-17 with total page 192 pages. Available in PDF, EPUB and Kindle. Book excerpt: From the Foreword Accelerated Testing: Nature and Artificial Weathering in the Coatings Industry is aimed at all those involved or interested in creating, producing, applying, and testing modern high-quality coatings for outdoor use. Coatings are exposed to a great many severe natural stresses that cause a gradual deterioration of the properties which are responsible for the coatings' very quality. Nevertheless, buyers expect coated products to remain in an as-new condition -- which is mostly characterised by a highly attractive appearance and intact surface -- for as long as possible. This calls for coatings of high weatherability and long service life. In this book, accelerated testing, through its simulation of the destructive action of natural weathering, is the means for testing this coating quality. Test engineers shoulder much responsibility because not only must the results form the basis for reliable predictions, but they must also be obtained economically and as quickly as possible. Their results are the dominant factor in any decision to take a new coating creation into series production. Accelerated testing has become an indispensable tool in the paint and coatings chemistry as a means of avoiding nasty surprises by coatings in normal use. Other methods of predicting service life are still too unreliable, given the extent of current weathering knowledge. Modern-day, high-quality coatings are highly complex systems which contain numerous essential additives. Not surprisingly, coatings chemistry is therefore sometimes jokingly likened to alchemy. But natural weathering, in all its random manifestations of different impact, is equally complex. Words alone cannot describe how best to simulate the team-like interaction of such a complex system in the laboratory. There is more to successful simulation than applying a standardized test method, or switching on a fully controlled weathering device which has been marketed as an all-rounder. It takes know-how, experience and skill. This book will help such abilities to be acquired.

Download or read book Accelerated Testing written by Bryan Dodson and published by SAE International. This book was released on 2021-08-16 with total page 252 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of accelerated testing theory is a difficult proposition, yet one that can result in considerable time and cost savings, as well as increasing a product's useful life. In Accelerated Testing: A Practitioner's Guide to Accelerated and Reliability Testing, readers are exposed to the latest, most practical knowledge available in this dynamic and important discipline. Authors Bryan Dodson and Harry Schwab draw on their considerable experience in the field to present comprehensive, insightful views in this book. Development and quality assurance tests are defined in detail and are presented from a practical viewpoint. Included are testing fundamentals, plans and models, and equipment and methods most commonly used in accelerated testing. Individuals seeking to evaluate and improve the design lives of components and systems will find this book a valuable reference, with special attention being paid to testing in the mobility industries.

Download or read book Trends in Development of Accelerated Testing for Automotive and Aerospace Engineering written by Lev M. Klyatis and published by Academic Press. This book was released on 2020-04-21 with total page 360 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accelerated testing (most types of laboratory testing, proving ground testing, intensive field/flight testing, any experimental research) is increasingly a key component for predicting of product's/process performance. Trends in Development Accelerated Testing for Automotive and Aerospace Engineering provides a completely updated analysis of the current status of accelerated testing, including the basic general directions of testing (methods and equipment) development, how one needs to study real world conditions for their accurate simulation and successful accelerated testing, describes in details the role of accurate simulation in the development of automotive and aerospace engineering, shows that failures are most often found in the interconnections, step-by-step instructions and examples. This is the only book presently available that considers in detail both the positive and negative trends in testing development for prediction quality, reliability, safety, durability, maintainability, supportability, profit, and decreasing life-cycle cost, recalls, complaints and other performance components of the product. The author presents new ideas and offers a unique strategic approach to obtaining solutions which were not possible using earlier. His methodology has been widely implemented, continue to be adopted throughout the world, and leads to advance society through product improvement that can reduce loss of life, injuries, financial losses, and product recalls. It also covers new ideas in development positive and cost- effective trends in testing development, especially accelerated reliability and durability testing (ART/ADT), which includes integration accurate simulation of field/flight influences, safety, human factors, and leads to successful prediction of product performance during pre-design, design, manufacturing, and usage for the product's service life. Engineers, researchers, teachers and postgraduate/advanced students who are involved in automotive and aerospace engineering will find this a useful reference on how to apply the accelerated testing method to solve practical problems in these areas. - Explains the similarities and differences between accelerated testing technologies used in automotive, aerospace, and other engineering fields - Provides a step-by-step guide for the accurate physical simulation of field conditions for test subjects - Includes case studies of accelerated testing in automotive and aerospace engineering

Download or read book Optimum Accelerated Life Testing Models With Time varying Stresses written by Preeti Wanti Srivastava and published by World Scientific. This book was released on 2017-02-23 with total page 444 pages. Available in PDF, EPUB and Kindle. Book excerpt: Today's manufacturers are under tremendous pressure to develop new technological and high reliability products in record time. This has motivated reliability engineers to evaluate the reliabilities of such products. Reliability testing under accelerated environment — accelerated life testing helps to meet this challenge.This comprehensive and must-have edition provides a broad coverage of the optimal design of Accelerated Life Test Plans under time-varying stress loadings. It also focuses on the formulation of Accelerated Life Test Sampling Plans (ALTSPs) which integrate accelerated life tests with quality control technique of acceptance sampling plans. These plans help to determine optimal experimental variables such as appropriate stress levels, optimal allocation at each stress levels, stress change points, etc, depending on the stress loading scheme. ALTSPs determine optimal plans such that the producers' and consumers' risks are safeguarded.

Download or read book Reliability Growth written by Panel on Reliability Growth Methods for Defense Systems and published by National Academy Press. This book was released on 2015-03-01 with total page 235 pages. Available in PDF, EPUB and Kindle. Book excerpt: A high percentage of defense systems fail to meet their reliability requirements. This is a serious problem for the U.S. Department of Defense (DOD), as well as the nation. Those systems are not only less likely to successfully carry out their intended missions, but they also could endanger the lives of the operators. Furthermore, reliability failures discovered after deployment can result in costly and strategic delays and the need for expensive redesign, which often limits the tactical situations in which the system can be used. Finally, systems that fail to meet their reliability requirements are much more likely to need additional scheduled and unscheduled maintenance and to need more spare parts and possibly replacement systems, all of which can substantially increase the life-cycle costs of a system. Beginning in 2008, DOD undertook a concerted effort to raise the priority of reliability through greater use of design for reliability techniques, reliability growth testing, and formal reliability growth modeling, by both the contractors and DOD units. To this end, handbooks, guidances, and formal memoranda were revised or newly issued to reduce the frequency of reliability deficiencies for defense systems in operational testing and the effects of those deficiencies. "Reliability Growth" evaluates these recent changes and, more generally, assesses how current DOD principles and practices could be modified to increase the likelihood that defense systems will satisfy their reliability requirements. This report examines changes to the reliability requirements for proposed systems; defines modern design and testing for reliability; discusses the contractor's role in reliability testing; and summarizes the current state of formal reliability growth modeling. The recommendations of "Reliability Growth" will improve the reliability of defense systems and protect the health of the valuable personnel who operate them.

Download or read book Accelerated Testing written by Bryan L Dodson and published by SAE International. This book was released on 2006-03-27 with total page 269 pages. Available in PDF, EPUB and Kindle. Book excerpt: The application of accelerated testing theory is a difficult proposition, yet one that can result in considerable time and cost savings, as well as increasing a product's useful life. In Accelerated Testing: A Practitioner's Guide to Accelerated and Reliability Testing, readers are exposed to the latest, most practical knowledge available in this dynamic and important discipline. Authors Bryan Dodson and Harry Schwab draw on their considerable experience in the field to present comprehensive, insightful views in this book. Development and quality assurance tests are defined in detail and are presented from a practical viewpoint. Included are testing fundamentals, plans and models, and equipment and methods most commonly used in accelerated testing. Individuals seeking to evaluate and improve the design lives of components and systems will find this book a valuable reference, with special attention being paid to testing in the mobility industries.

Download or read book Understanding and Measuring the Shelf Life of Food written by R. Steele and published by Woodhead Publishing. This book was released on 2004-05-10 with total page 434 pages. Available in PDF, EPUB and Kindle. Book excerpt: The shelf-life of a product is critical in determining both its quality and profitability. This important collection reviews the key factors in determining shelf-life and how it can be measured. Part one examines the factors affecting shelf-life and spoilage, including individual chapters on the major types of food spoilage, the role of moisture and temperature, spoilage yeasts, the Maillard reaction and the factors underlying lipid oxidation. Part two addresses the best ways of measuring the shelf-life of foods, with chapters on modelling food spoilage, measuring and modelling glass transition, detecting spoilage yeasts, measuring lipid oxidation, the design and validation of shelf-life tests and the use of accelerated shelf-life tests. Understanding and measuring the shelf-life of food is an important reference for all those concerned with extending the shelf-life of food. Reviews the key factors in determining shelf-life and how they can be measured Examines the importance of the shelf-life of a product in determining its quality and profitability Brings together the leading international experts in the field

Download or read book Achieving Product Reliability written by Necip Doganaksoy and published by CRC Press. This book was released on 2021-06-21 with total page 249 pages. Available in PDF, EPUB and Kindle. Book excerpt: Are you buying a car or smartphone or dishwasher? We bet long-term, trouble-free operation (i.e., high reliability) is among the top three things you look for. Reliability problems can lead to everything from minor inconveniences to human disasters. Ensuring high reliability in designing and building manufactured products is principally an engineering challenge–but statistics plays a key role. Achieving Product Reliability explains in a non-technical manner how statistics is used in modern product reliability assurance. Features: Describes applications of statistics in reliability assurance in design, development, validation, manufacturing, and field tracking. Uses real-life examples to illustrate key statistical concepts such as the Weibull and lognormal distributions, hazard rate, and censored data. Demonstrates the use of graphical tools in such areas as accelerated testing, degradation data modeling, and repairable systems data analysis. Presents opportunities for profitably applying statistics in the era of Big Data and Industrial Internet of Things (IIoT) utilizing, for example, the instantaneous transmission of large quantities of field data. Whether you are an intellectually curious citizen, student, manager, budding reliability professional, or academician seeking practical applications, Achieving Product Reliability is a great starting point for a big-picture view of statistics in reliability assurance. The authors are world-renowned experts on this topic with extensive experience as company-wide statistical resources for a global conglomerate, consultants to business and government, and researchers of statistical methods for reliability applications.

Download or read book Creation Validation and Implementation of a Highly Accelerated Life Testing HALT Procedure to Improve the Reliability of Printed Circuit Boards written by Abhishek Singh (M. Eng.) and published by . This book was released on 2016 with total page 99 pages. Available in PDF, EPUB and Kindle. Book excerpt: Highly Accelerated Life Testing (HALT) is a test methodology to evaluate the reliability of electronic and electromechanical devices. This thesis aimed at the implementation of Highly Accelerated Life Testing (HALT) on Printed Circuit Boards. A standard operating procedure for implementing Highly Accelerated Life Testing (HALT) to increase the reliability of PCBs used in various Waters equipment is developed and validated. For the creation of the standard operating procedure a very reliable Alliance PCB is selected that acts as a benchmark for screening other boards. Extensive testing is done on the Alliance PCB by subjecting it to thermal and vibration stresses through a Hot Step Stress profile, Cold Step Stress profile, Thermal Cycling, Vibration Step Stress profile and Combined Cycle profile. For validation, the standard operating procedure created is applied to a less reliable Acquity board to check whether the same standard operating procedure is effective in precipitating and detecting failures on a variety of different boards that Waters equipment uses. As expected the operating limits of temperature and vibration of the Acquity board are found to be less than the Alliance board i.e. the Acquity experiences failure much earlier than Alliance when subjected to the same stress profiles. This result is in direct correlation with the on field failure data obtained for these two boards - the less reliable board has lesser operating limits.

Download or read book SAE International s Dictionary of Testing Verification and Validation written by Jon M. Quigley and published by SAE International. This book was released on 2023-10-30 with total page 463 pages. Available in PDF, EPUB and Kindle. Book excerpt: Created to elevate expertise in testing, verification, and validation with industry-specific terminology, readers are empowered to navigate the complex world of quality assurance. From foundational concepts to advanced principles, each entry provides clarity and depth, ensuring the reader becomes well-versed in the language of precision. This dictionary is an indispensable companion for both professionals and students seeking to unravel the nuances of testing methodologies, verification techniques, and validation processes. Readers will be equipped with the tools to communicate effectively, make informed decisions, and excel in projects. In addition, references to SAE Standards are included to direct the read to additional information beyond a practical definition. (ISBN 9781468605907, ISBN 9781468605914, ISBN 9781468605921, DOI 10.4271/9781468605914)

Download or read book Next Generation HALT and HASS written by Kirk A. Gray and published by John Wiley & Sons. This book was released on 2016-03-11 with total page 296 pages. Available in PDF, EPUB and Kindle. Book excerpt: Next Generation HALT and HASS presents a major paradigm shift from reliability prediction-based methods to discovery of electronic systems reliability risks. This is achieved by integrating highly accelerated life test (HALT) and highly accelerated stress screen (HASS) into a physics-of-failure-based robust product and process development methodology. The new methodologies challenge misleading and sometimes costly mis-application of probabilistic failure prediction methods (FPM) and provide a new deterministic map for reliability development. The authors clearly explain the new approach with a logical progression of problem statement and solutions. The book helps engineers employ HALT and HASS by illustrating why the misleading assumptions used for FPM are invalid. Next, the application of HALT and HASS empirical discovery methods to quickly find unreliable elements in electronics systems gives readers practical insight to the techniques. The physics of HALT and HASS methodologies are highlighted, illustrating how they uncover and isolate software failures due to hardware-software interactions in digital systems. The use of empirical operational stress limits for the development of future tools and reliability discriminators is described. Key features: * Provides a clear basis for moving from statistical reliability prediction models to practical methods of insuring and improving reliability. * Challenges existing failure prediction methodologies by highlighting their limitations using real field data. * Explains a practical approach to why and how HALT and HASS are applied to electronics and electromechanical systems. * Presents opportunities to develop reliability test discriminators for prognostics using empirical stress limits. * Guides engineers and managers on the benefits of the deterministic and more efficient methods of HALT and HASS. * Integrates the empirical limit discovery methods of HALT and HASS into a physics of failure based robust product and process development process.

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Download or read book Accelerated Testing written by Wayne Nelson and published by Wiley-Interscience. This book was released on 1990-02-16 with total page 626 pages. Available in PDF, EPUB and Kindle. Book excerpt: Accelerated Testing Statistical Models, Test Plans, and Data Analyses; Contents; Preface; 1. Introduction and Background; 2. Models for Life Tests with Constant Stress; 3. Graphical Data Analysis; 4. Complete Data and Least Squares Analyses; 5. Censored Data and Maximum Ukelihood Methods; 6. Test Plans; 7. Competing Failure Modes and Size Effect; 8. Least-Squares Comparisons for Complete Data; 9. Maximum Likelihood Comparisons for Censored and Other Data; 10. Models and Data Analyses for Step and Varying Stress; 11. Accelerated Degradation; Appendix A. Statistical Tables; References; Index