Download or read book Reliability Issues for DOD Systems written by National Research Council and published by National Academies Press. This book was released on 2002-12-26 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: The final report of the National Research Council's (NRC) Panel on Statistical Methods for Testing and Evaluating Defense Systems (National Research Council, 1998) was intended to provide broad advice to the U.S. Department of Defense (DoD) on current statistical methods and principles that could be applied to the developmental and operational testing and evaluation of defense systems. To that end, the report contained chapters on the use of testing as a tool of system development; current methods of experimental design; evaluation methods; methods for testing and assessing reliability, availability, and maintainability; software development and testing; and validation of modeling and simulation for use in operational test and evaluation. While the examination of such a wide variety of topics was useful in helping DoD understand the breadth of problems for which statistical methods could be applied and providing direction as to how the methods currently used could be improved, there was, quite naturally, a lack of detail in each area. To address the need for further detail, two DoD agencies-the Office of the Director of Operational Test and Evaluation and the Office of the Under Secretary of Defense for Acquisition, Technology, and Logistics-asked the NRC's Committee on National Statistics to initiate a series of workshops on statistical issues relevant to defense acquisition. The aim of each workshop is to inform DoD about the methods that represent the statistical state of the art and, through interactions of the statistical and defense communities, explore their relevance for DoD application.
Download or read book Statistics Testing and Defense Acquisition written by National Research Council and published by National Academies Press. This book was released on 1999-09-17 with total page 180 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Panel on Statistical Methods for Testing and Evaluating Defense Systems had a broad mandate-to examine the use of statistics in conjunction with defense testing. This involved examining methods for software testing, reliability test planning and estimation, validation of modeling and simulation, and use of modem techniques for experimental design. Given the breadth of these areas, including the great variety of applications and special issues that arise, making a contribution in each of these areas required that the Panel's work and recommendations be at a relatively general level. However, a variety of more specific research issues were either brought to the Panel's attention by members of the test and acquisition community, e.g., what was referred to as Dubin's challenge (addressed in the Panel's interim report), or were identified by members of the panel. In many of these cases the panel thought that a more in-depth analysis or a more detailed application of suggestions or recommendations made by the Panel would either be useful as input to its deliberations or could be used to help communicate more individual views of members of the Panel to the defense test community. This resulted in several research efforts. Given various criteria, especially immediate relevance to the test and acquisition community, the Panel has decided to make available three technical or background papers, each authored by a Panel member jointly with a colleague. These papers are individual contributions and are not a consensus product of the Panel; however, the Panel has drawn from these papers in preparation of its final report: Statistics, Testing, and Defense Acquisition. The Panel has found each of these papers to be extremely useful and they are strongly recommended to readers of the Panel's final report.
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 Reliability Issues for DOD Systems written by National Research Council and published by National Academies Press. This book was released on 2002-11-26 with total page 103 pages. Available in PDF, EPUB and Kindle. Book excerpt: The final report of the National Research Council's (NRC) Panel on Statistical Methods for Testing and Evaluating Defense Systems (National Research Council, 1998) was intended to provide broad advice to the U.S. Department of Defense (DoD) on current statistical methods and principles that could be applied to the developmental and operational testing and evaluation of defense systems. To that end, the report contained chapters on the use of testing as a tool of system development; current methods of experimental design; evaluation methods; methods for testing and assessing reliability, availability, and maintainability; software development and testing; and validation of modeling and simulation for use in operational test and evaluation. While the examination of such a wide variety of topics was useful in helping DoD understand the breadth of problems for which statistical methods could be applied and providing direction as to how the methods currently used could be improved, there was, quite naturally, a lack of detail in each area. To address the need for further detail, two DoD agencies-the Office of the Director of Operational Test and Evaluation and the Office of the Under Secretary of Defense for Acquisition, Technology, and Logistics-asked the NRC's Committee on National Statistics to initiate a series of workshops on statistical issues relevant to defense acquisition. The aim of each workshop is to inform DoD about the methods that represent the statistical state of the art and, through interactions of the statistical and defense communities, explore their relevance for DoD application.
Download or read book Industrial Methods for the Effective Development and Testing of Defense Systems written by National Research Council and published by National Academies Press. This book was released on 2012-02-27 with total page 102 pages. Available in PDF, EPUB and Kindle. Book excerpt: During the past decade and a half, the National Research Council, through its Committee on National Statistics, has carried out a number of studies on the application of statistical methods to improve the testing and development of defense systems. These studies were intended to provide advice to the Department of Defense (DOD), which sponsored these studies. The previous studies have been concerned with the role of statistical methods in testing and evaluation, reliability practices, software methods, combining information, and evolutionary acquisition. Industrial Methods for the Effective Testing and Development of Defense Systems is the latest in a series of studies, and unlike earlier studies, this report identifies current engineering practices that have proved successful in industrial applications for system development and testing. This report explores how developmental and operational testing, modeling and simulation, and related techniques can improve the development and performance of defense systems, particularly techniques that have been shown to be effective in industrial applications and are likely to be useful in defense system development. In addition to the broad issues, the report identifies three specific topics for its focus: finding failure modes earlier, technology maturity, and use of all relevant information for operational assessments.
Download or read book Testing of Defense Systems in an Evolutionary Acquisition Environment written by National Research Council and published by National Academies Press. This book was released on 2006-04-13 with total page 76 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Department of Defense (DoD) recently adopted evolutionary acquisition, a dynamic strategy for the development and acquisition of its defense systems. Evolutionary defense systems are planned, in advance, to be developed through several stages in a single procurement program. Each stage is planned to produce a viable system which could be fielded. The system requirements for each stage of development may be specified in advance of a given stage or may be decided at the outset of that stage's development. Due to the different stages that comprise an evolutionary system, there exists a need for careful reexamination of current testing and evaluation policies and processes, which were designed for single-stage developments. The Office of the Under Secretary of Defense for Acquisition, Technology and Logistics (USD-AT&L) and the Director of Operational Testing and Evaluation (DOT&E) asked the Committee on National Statistics (CNSTAT) of the National Academies to examine the key issues and implications for defense testing from the introduction of evolutionary acquisition. The CNSTAT was charged with planning and conducting a workshop to study test strategies for the evolutionary acquisition. The committee reviewed defense materials defining evolutionary acquisition and interviewed test officials from the three major test service agencies to understand the current approaches used in testing systems procured through evolutionary acquisition. The committee also examined possible alternatives to identify problems in implementation. At the workshop that took place on December 13-14, 2004, the committee tried to answer many questions including: What are the appropriate roles and objectives for testing in an evolutionary environment?, Can a systematic, disciplined process be developed for testing and evaluation in such a fluid and flexible environment?, and Is there adequate technical expertise within the acquisition community to fully exploit data gathered from previous stages to effectively combine information from various sources for test design and analysis?. Testing of Defense Systems in an Evolutionary Acquisition Environment provides the conclusions and recommendations of the CNSTAT following the workshop and its other investigations.
Download or read book Test and Evaluation written by Michael E. Motley and published by DIANE Publishing. This book was released on 1997-02 with total page 54 pages. Available in PDF, EPUB and Kindle. Book excerpt: This report addresses Test and Evaluation (T&E) of software intensive systems and the DoD's efforts to improve the software process. DoD software costs total over $30 billion a year, of which 2/3's is for maintaining, upgrading, and modifying operational systems already in production. Today's major defense systems depend largely on the quality of this complex and increasingly costly software. Because software error can cause a system to fail, possibly with life threatening consequences, software intensive systems need to be thoroughly tested before production. Charts and tables.
Download or read book DOD systems certification and accreditation problems written by Daniel Osafo Harrison and published by . This book was released on 2016 with total page 0 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book System Reliability Toolkit written by David Nicholls and published by RIAC. This book was released on 2005 with total page 872 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Best Practices for Reliability Assessment and Verification written by and published by . This book was released on 2008 with total page 10 pages. Available in PDF, EPUB and Kindle. Book excerpt: The Department of Defense (DoD) is working closely with the Government Electronics and Information Technology Association on the development of a GEIA-STD-0009, Reliability Program Standard for Systems Design, Development, and Manufacturing, at the behest of the Defense Science Board Developmental Test Task Force. It is hoped that GEIA-STD-0009 will improve the odds that military systems will successfully demonstrate reliability requirements in both developmental and operational testing. This article provides an overview of GEIA-STD-0009 along with initial guidance regarding its application, with an emphasis on the assessment and verification of system reliability.
Download or read book DOD systems modernization uncertain joint use and marginal expected value of military asset deployment system warrant reassessment of planned investment written by and published by DIANE Publishing. This book was released on with total page 50 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Global war on terrorism DOD needs to improve the reliability of cost data and provide additional guidance to control costs report to congressional committees written by and published by DIANE Publishing. This book was released on 2005 with total page 75 pages. Available in PDF, EPUB and Kindle. Book excerpt: GAO found numerous problems in DOD's processes for recording and reporting costs for GWOT, raising significant concerns about the overall reliability of DOD's reported cost data. As a result, neither DOD nor Congress can reliably know how much the war is costing and details on how appropriated funds are being spent, or have historical data useful in considering future funding needs. On the basis of GAO's work, DOD is taking steps to improve its cost reporting. Factors affecting the reliability of DOD's reported costs include long-standing deficiencies in DOD's financial systems, the lack of a systematic process to ensure that data are correctly entered into those systems, inaccurately reported costs, and difficulties in properly categorizing costs. In at least one case, reported costs may be materially overstated. Specifically, DOD's reported obligations for mobilized Army reservists in fiscal year 2004 were based primarily on estimates rather than actual information and differed from related payroll information by as much as $2.1 billion, or 30 percent of the amount DOD reported in its cost report. In addition, GAO found inadvertent double counting in the Navy's and Marine Corps' portion of DOD's reported costs amounting to almost $1.8 billion from November 2004 through April 2005. Because it was not feasible to examine all reported costs and significant data reliability problems existed, GAO was not able to determine the extent that total costs were misstated.
Download or read book Sampling Procedures and Tables for Life and Reliability Testing based on Exponential Distribution written by United States. Office of the Assistant Secretary of Defense (Supply and Logistics) and published by . This book was released on 1960 with total page 94 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Reliability Maintainability and Supportability written by Michael Tortorella and published by John Wiley & Sons. This book was released on 2015-02-25 with total page 464 pages. Available in PDF, EPUB and Kindle. Book excerpt: Focuses on the core systems engineering tasks of writing,managing, and tracking requirements for reliability,maintainability, and supportability that are most likely to satisfycustomers and lead to success for suppliers This book helps systems engineers lead the development ofsystems and services whose reliability, maintainability, andsupportability meet and exceed the expectations of their customersand promote success and profit for their suppliers. This book isorganized into three major parts: reliability, maintainability, andsupportability engineering. Within each part, there is material onrequirements development, quantitative modelling, statisticalanalysis, and best practices in each of these areas. Heavy emphasisis placed on correct use of language. The author discusses the useof various sustainability engineering methods and techniques incrafting requirements that are focused on the customers’needs, unambiguous, easily understood by the requirements’stakeholders, and verifiable. Part of each major division of thebook is devoted to statistical analyses needed to determine whenrequirements are being met by systems operating in customerenvironments. To further support systems engineers in writing,analyzing, and interpreting sustainability requirements, this bookalso Contains “Language Tips” to help systems engineerslearn the different languages spoken by specialists andnon-specialists in the sustainability disciplines Provides exercises in each chapter, allowing the reader to tryout 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 forsystems engineers Reliability, Maintainability, and Supportability is a referencefor systems engineers and graduate students hoping to learn how toeffectively determine and develop appropriate requirements so thatdesigners may fulfil the intent of the customer.
Download or read book Global Positioning System written by United States. General Accounting Office and published by . This book was released on 1991 with total page 20 pages. Available in PDF, EPUB and Kindle. Book excerpt:
Download or read book Defense Acquisitions written by Michael J. Sullivan and published by DIANE Publishing. This book was released on 2010-11 with total page 34 pages. Available in PDF, EPUB and Kindle. Book excerpt: In May 2009, Congress passed the Weapon Systems Acquisition Reform Act of 2009 (Reform Act). The Reform Act contains a number of systems engineering and developmental testing requirements that are aimed at helping weapon programs establish a solid foundation from the start of development. This report examined: (1) DoD's progress in implementing the systems engineering and developmental testing requirements; (2) views on the alignment of the offices of the Directors of Systems Engineering and Developmental Test and Evaluation; and (3) challenges in strengthening systems engineering and developmental testing activities. Includes recommendations. Charts and tables.
Download or read book Military Communications Joint Tactical Information Distribution System Issues written by United States. General Accounting Office and published by . This book was released on 1992 with total page 28 pages. Available in PDF, EPUB and Kindle. Book excerpt: