Annual Reliability and Maintainability Symposium 1992 Proceedings

21-23 Jan. 1992

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  • Annual Reliability and Maintainability Symposium. 1992 Proceedings (Cat. No.92CH3108-8)

    Publication Year: 1992
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    Freely Available from IEEE
  • MSIX: a general and user-friendly platform for RAM analysis

    Publication Year: 1992, Page(s):501 - 505
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (360 KB)

    The authors present a CAD (computer-aided design) platform supporting RAM (reliability, availability, and maintainability) analysis with efficient system description and alternative evaluation. The design concepts, implementation techniques, and application results are described. This platform is user-friendly because of its graphic environment, drawing facilities, object orientation, self-tutorin... View full abstract»

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  • HiRel-reliability/availability integrated workstation tool

    Publication Year: 1992, Page(s):491 - 500
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (780 KB)

    The HiRel software tool is described and demonstrated by application to the mission avionics subsystem of the advanced system integration demonstrations (ASID) system that utilizes the PAVE PILLAR approach. HiRel marks another accomplishment toward the goal of producing a totally integrated computer-aided design (CAD) workstation design capability. Since a reliability engineer generally represents... View full abstract»

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  • Method for obtaining long-length strength distributions for reliability prediction

    Publication Year: 1992, Page(s):389 - 391
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (264 KB)

    A technique for measuring the fiber strength distribution of many kilometers of fiber was developed. The strength distribution of 100 km can be generated in a week's time by a single operator. A strength distribution for 1300 km of fiber is shown to depart from the high strength region around the 1% failure probability level, and exhibits the beginnings of the truncated portion of the strength dis... View full abstract»

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  • Process-related reliability-growth modeling-how and why

    Publication Year: 1992, Page(s):316 - 321
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    A process-related nonhomogeneous Poisson process (PRNHPP) is developed. This is carried out by replacing the constant scale factor in the NHP by a process-age-dependent scale factor which increases asymptotically over process-age-time to a mature-process scale factor value. The authors describe the maximum likelihood estimation (MLE) techniques for obtaining parameter values for the PRNHPP, as wel... View full abstract»

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  • A blackboard model of an expert system for failure mode and effects analysis

    Publication Year: 1992, Page(s):483 - 490
    Cited by:  Papers (5)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (624 KB)

    The design of an expert system to assist in performing a failure mode and effects analysis (FMEA) is approached from a knowledge-use-level perspective to provide a thorough understanding of the problem and insight into the knowledge and expertise needed to automate the FMEA process. A blackboard model is a conceptual model that provides the organizational principles required for the design of an e... View full abstract»

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  • Fiber optics-failure modes and mechanisms

    Publication Year: 1992, Page(s):379 - 388
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (516 KB)

    A study was conducted to investigate the frequency and cause of failures of fiber-optic transmitters, waveguides, receivers, connectors, and splices. To accomplish this, quantitative and qualitative data were collected and evaluated to determine why and when failures occurred and to identify design options which can be made to avoid these failure conditions. An understanding of fiber-optic device ... View full abstract»

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  • Robustness of reliability-growth analysis techniques

    Publication Year: 1992, Page(s):303 - 315
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (756 KB)

    The author examines the robustness of techniques commonly applied to failure time data to determine if the failure rate (1/mean-time-between-failures) is changing over time. The models examined are the Duane postulate, Crow-Army material systems analysis activity, and Kalman filtering (also referred to as dynamic linear modeling). Each has as a foundation the underlying premise of changing failure... View full abstract»

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  • Reliability, availability, and maintainability expert system (RAMES)

    Publication Year: 1992, Page(s):478 - 482
    Cited by:  Papers (2)  |  Patents (4)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (428 KB)

    A RAM modeling, analysis, and decision support system-the Reliability, Availability, and Maintainability (RAM) Expert System (RAMES)-has been developed to assist a weapon system program manager (SPM) in weapon system RAM performance analysis, master planning of RAM performance enhancements, assessment of RAM enhancement payoffs, and evaluation of mission capability, wartime operational rates, fix ... View full abstract»

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  • The Shuttle Processing Contractors (SPC) reliability program at the Kennedy Space Center; the real world

    Publication Year: 1992, Page(s):376 - 378
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (248 KB)

    The Shuttle Processing Contract (SPC) workforce consists of Lockheed Space Operations Co. as prime contractor, with Grumman, Thiokol Corporation, and Johnson Controls World Services as a subcontractors. During the design phase, reliability engineering is instrumental in influencing the development of systems that meet the Shuttle fail-safe program requirements. Reliability engineers accomplish thi... View full abstract»

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  • Role of failure-mechanism identification in accelerated testing

    Publication Year: 1992, Page(s):181 - 188
    Cited by:  Papers (13)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (640 KB)

    The authors summarize common failure mechanisms in electronic devices and packages and investigate possible failure mechanism shifting during accelerated testing. It is noted that in accelerated tests the stress applied can produce failure mechanisms that are different from those observed during actual service conditions. Therefore, failure mechanism identification and the setting up of stress lim... View full abstract»

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  • Generation of models for reliability growth

    Publication Year: 1992, Page(s):299 - 302
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (312 KB)

    The author considers computerized reliability growth model generation based on the development of Petri nets. The proposed method makes it possible to show and investigate the main aspects of debugging using the following techniques: time-variable stochastic mechanism of manifestation and removal of already existing errors and new errors introduced in the debugging process; time and probability ch... View full abstract»

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  • Engineering reliability and maintainability review-a regimen for discovering production deficiencies

    Publication Year: 1992, Page(s):475 - 477
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (260 KB)

    An engineering reliability and maintainability review (ER&MR) is a methodical disassembly, visual inspection, and physical examination of a production unit of airborne equipment by a team of reviewers from reliability, maintainability, and other technical disciplines. Established at Douglas Aircraft for the DC-10 program and recently upgraded, ER&MR facilitates detection of unit design and... View full abstract»

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  • Lessons learned from evaluating launch-site processing problems of Space Shuttle payloads

    Publication Year: 1992, Page(s):259 - 265
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (744 KB)

    The authors discuss a trend analysis program that is being conducted on the problem reports written during the processing of Space Shuttle payloads at Kennedy Space Center. The program is aimed at developing lessons learned that can both improve the effectiveness of the current payload processing cycles as well as help to guide the processing strategies for Space Station Freedom. The payload proce... View full abstract»

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  • Approximate fault-tree analysis without cut sets

    Publication Year: 1992, Page(s):370 - 375
    Cited by:  Papers (3)  |  Patents (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (404 KB)

    It is shown that a rather efficient approximate fault tree analysis is possible on the basis of the Shannon decomposition. The main advantages are: (1) no preprocessing is necessary to determine all the mincuts; (2) the maximum error can be prespecified; and (3) noncoherent systems and systems with dependent component states can be treated. The main disadvantage is the fact that the cutting off of... View full abstract»

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  • Software-reliability feedback: a physics-of-failure approach

    Publication Year: 1992, Page(s):285 - 289
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (368 KB)

    The authors advocate a physics of failure approach to the understanding and improvement of the software development process. A physics of failure analysis is a detailed examination of all information available about a software problem to determine why the problem was introduced into the software in the first place, and when and how the problem was discovered. The results of the analysis are used t... View full abstract»

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  • Introducing R&M and testability into the undergraduate system-design course

    Publication Year: 1992, Page(s):140 - 143
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (268 KB)

    In October 1989 Florida Institute of Technology introduced reliability, maintainability, and testability (R/M/T) material into its three-quarter Electrical and Computer Engineering System Design course sequence. This course originally had senior-year students conceive, design, fabricate, test, and demonstrate a working prototype of their proposed projects. This R/M/T material provided an emphasis ... View full abstract»

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  • Preventive-maintenance impact on plant availability

    Publication Year: 1992, Page(s):177 - 180
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (344 KB)

    The relationship between plant availability and preventive maintenance (PM) is examined. It is concluded that unexpected failures that lead to partial or full plant forced outages are costly events that should be avoided. Plant availability is improved (i.e., forced outages are reduced) in one of two ways: maintain or increase equipment MTBF (mean time between failure) and/or reduce its MTTR (mean... View full abstract»

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  • Fastener-torque model to enhance reliability under cyclic load

    Publication Year: 1992, Page(s):196 - 201
    Cited by:  Papers (1)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (304 KB)

    A model and a FORTRAN program have been developed to determine the optimum torque required for various applications of threaded fasteners, considering design variables such as thread geometry, size, material, and friction coefficients. The model approach is useful in ensuring optimum torque for fasteners under cyclic load conditions. The optimum torque varies widely, and rules-of-thumb cannot cons... View full abstract»

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  • A software-reliability assessment model

    Publication Year: 1992, Page(s):294 - 298
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (348 KB)

    The author presents an original approach to software prediction based on previous studies conducted under Rome Laboratories' (formerly RADC) contracts. In the model presented, tradeoff analysis is performed on the software architecture, taking into account the future operational use of the software studied. The organization and the amount of effort spent on the development are also discussed. The ... View full abstract»

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  • A simulation model for maintenance planning

    Publication Year: 1992, Page(s):109 - 118
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (760 KB)

    The author discusses the application of simulation models to evaluate maintenance policies for an automated production line in a steel rolling mill. This production line is a multistage transfer machine that converts black wire reel stock into ground and polished steel rods of standard length using multistage processing. In order to characterize subsystem failure and repair mechanisms, the entire ... View full abstract»

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  • Reliability assessment and prediction during product development

    Publication Year: 1992, Page(s):468 - 474
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (380 KB)

    In today's environment, project managers are often called upon to assess the reliability of highly reliable systems both during and at the end of their development stages without the benefit of extensive test results. These assessments are used to determine whether the project is on schedule and/or if additional testing or development is required. The small amount of actual test data and the lack ... View full abstract»

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  • Development of a reliable and maintainable electronic countermeasures ECM pod: a case study

    Publication Year: 1992, Page(s):253 - 258
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (524 KB)

    The authors summarize the development of the AN/ALQ-184 ECM (electronic countermeasures) pod. Particular attention is given to the reliability and maintainability test tasks which demonstrated that the AN/ALQ-184 pod is both reliable and maintainable. These test results were substantiated by operational use of the pod in combat View full abstract»

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  • Design management-begin at the beginning

    Publication Year: 1992, Page(s):98 - 100
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (240 KB)

    It is pointed out that the current economic environment dictates that some US firms compress product design and development cycles to retain eroding market share and sustain some degree of competitive advantage. To accomplish this, manufacturers must utilize formalized design techniques to boost design efficiency, minimize errors, lower product cost, increase reliability, and shorten time to marke... View full abstract»

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  • Reliability assurance-the UK Ministry of Defence approach

    Publication Year: 1992, Page(s):456 - 459
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (316 KB)

    The UK Ministry of Defence (MOD) is conducting a high-level campaign to secure improved levels of reliability and maintainability in new weapons and equipment. As part of this campaign, emphasis is being placed not only on the front-end specification and design activities, but also on the methods of assurance. The use of an in-service reliability demonstration serves not only to establish the achi... View full abstract»

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