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Annual Reliability and Maintainability Symposium 1992 Proceedings

21-23 Jan. 1992

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Displaying Results 1 - 25 of 81
  • Annual Reliability and Maintainability Symposium. 1992 Proceedings (Cat. No.92CH3108-8)

    Publication Year: 1992
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    Freely Available from IEEE
  • Desert Storm environmental effects

    Publication Year: 1992, Page(s):249 - 252
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    It is noted that after more than six months of operation of the Patriot launch station in the Saudi Arabian desert no problems that were attributed to high temperature occurred. The environmental anomalies that did occur were cosmetic in nature and related to dust and salt fog. It was concluded that the Desert Storm environmental effects were typical of worldwide hot, dry climates View full abstract»

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  • Future role of ESA R&M assurance in space flight exploration

    Publication Year: 1992, Page(s):241 - 242
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (108 KB)

    Future ESA (European Space Agency) planning with regard to R&M (reliability and maintainability) assurance is examined. The author believes that one should move steadily and rigorously ahead in the assurance sciences, ensuring that one always understands the failure mechanism level, and that one should proceed in traceable and risk-defined increments to total system and technology peripheries.... 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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  • Future role of NASA R&M assurance in space flight exploration

    Publication Year: 1992, Page(s):239 - 240
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (144 KB)

    The NASA Office of Safety and Mission Quality has introduced several R&M (reliability and maintainability) initiatives to address future program and mission requirements. The overall objective is to ensure that R&M criteria and activities are integrated as early as possible in the design phase. A representative cross-section of the major initiatives is given View full abstract»

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  • Data-base reliability: a case study

    Publication Year: 1992, Page(s):272 - 273
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (188 KB)

    The author describes the process used to improve the quality of PRACA (Problem Reporting and Corrective Action) data at the Kennedy Space Center and the impact of data changes on the system users, using one data element (work area code) as the basis of the study. It is concluded that the implementation of data dictionary edits were extremely helpful in improving the quality and consistency of data... View full abstract»

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  • Reliability techniques for combined hardware/software systems

    Publication Year: 1992, Page(s):290 - 293
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    A study was conducted to develop practical techniques for reliability modeling, allocation, prediction, growth testing, and demonstration testing of systems that contain both hardware and software elements. A large part of the research addressed the use of software product/process metrics to predict software reliability. The study culminated in the preparation of a draft MIL-HDBK on hardware/softw... View full abstract»

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  • Submarine pipeline automatic-repair system-an approach to the mission-availability assessment

    Publication Year: 1992, Page(s):126 - 130
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (396 KB)

    The authors present the methodology followed to evaluate the mission availability of a remotely controlled submarine system designed to repair damaged pipelines in deep waters. The goal of the analysis has been to identify the technical and operational solutions with respect mainly to the logistic support system design, to guarantee operational availability and thereby minimize delays. To this pur... 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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  • A simplified but accurate approach for reliability computation of a complex system

    Publication Year: 1992, Page(s):436 - 440
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    A methodology for the reliability computation of complex systems is presented. It is assumed that the individual s-independent random variables composing the strength and stress of a given system are s-normal. The functional relationship is usually complex. As a result, the derivation of the distribution of stress or strength exceeds the capacity of common transformation or convo... View full abstract»

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  • Maintenance processor/time stress measurement device (MP/TSMD) use for failure trend analysis

    Publication Year: 1992, Page(s):228 - 238
    Cited by:  Papers (4)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (1028 KB)

    The authors define the use of advanced built-in-test-equipment technology to reduce or eliminate reliability and maintainability problems associated with on-equipment fault detection and isolation. System supportability requirements for both mature and new systems defined the need for a subsystem level device to perform built-in-test (BIT) functions in addition to capturing environmental stress da... View full abstract»

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  • Reliability prediction for a class of highly reliable digital systems

    Publication Year: 1992, Page(s):12 - 18
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (416 KB)

    Three theorems which show that the reliability of a popular class of systems can be computed using small and simple models are presented. This class consists of systems that are assemblages of subsystems where each subsystem is a majority-voting threeplex plus spares or majority-voting fourplex plus spares. The theorems are error bounds for model reduction and simplification. The error bounds are ... View full abstract»

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  • Temperature and vibration results from captive-store flight tests provide a reliability improvement tool

    Publication Year: 1992, Page(s):266 - 271
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (552 KB)

    The ALQ-131 electronic countermeasure (ECM) system has provided the United States Air Force with proven self-protection for many of its tactical fighter aircraft. The reliability and maintainability (R&M) improvements of the ALQ-131 Block II has produced a system with a mean time between failures (MTBF) of 120 to 180 h and greater than 95% availability for the 390 systems in theater during the... 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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  • Piece-part reliability-allocation using actual failure data

    Publication Year: 1992, Page(s):119 - 125
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (484 KB)

    The author documents the piece part failure assessment and predominant failure mode analyses performed on the US Strategic Petroleum Reserve (SPR) sites to provide piece part failure rates for the various classes of equipment. These data would then be used in a stock-level-allocation-model to determine the number of spares that should be stocked to meet particular mission requirements such as stoc... View full abstract»

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  • Improving reliability and maintainability through process management

    Publication Year: 1992, Page(s):93 - 97
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (420 KB)

    A recent study by the Scientific Advisory Board found that the US Air Force spends approximately $2 billion a year on simple structural aircraft parts. Responsibility and management of these parts (fasteners, actuators, connectors, tools, and subsystems, or FACTS) is spread across the Air Force major commands and weapon systems. In order to improve the reliability and maintainability (R&M) of ... View full abstract»

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  • Connection between reliability and signalling-safety in railway technology

    Publication Year: 1992, Page(s):75 - 79
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (400 KB)

    It is shown that signalling safety is a subterm of reliability. This connection is not generally known, although railway signalling engineers have been pioneers in this field. It is pointed out that the main tools for implementation of signalling safety are fail-safe techniques, and it can be shown that most of the methods used for fail-safe validations are the same as these in reliability techniq... View full abstract»

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  • Modular techniques for dynamic fault tree-analysis

    Publication Year: 1992, Page(s):363 - 369
    Cited by:  Papers (5)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (476 KB)

    It is noted that current approaches used to assess the dependability of complex systems such as Space Station Freedom and the Air Traffic Control System are incapable of handling the size and complexity of these highly integrated designs. A novel technique for modeling such systems which is built upon current techniques in Markov theory and combinatorial analysis is described. It enables the devel... View full abstract»

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  • A reliability allocation method for combination serial-parallel systems

    Publication Year: 1992, Page(s):432 - 435
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (328 KB)

    While many authors have presented algorithms to handle allocation to serial systems, the author also addresses parallel systems. Traditionally, a serial allocation drives the redundancy decisions. However, significant redundancies already exist in the system configuration described. These redundancies are due to partial overlap of functions being performed by an otherwise serial system. An algorit... View full abstract»

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  • A testability-dependent maintainability-prediction technique

    Publication Year: 1992, Page(s):223 - 227
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The authors outline a novel mean-time-to-repair (MTTR) prediction technique which is a modification of MIL-HDBK-472 procedure V. The modifications directly relate testability characteristics to maintainability parameters and introduce the influence that different maintenance and repair philosophies have on MTTR. A computerized version of this technique is also discussed. Future plans include propo... View full abstract»

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  • Modeling and simulation for reliability prediction of implantable cardiac pacemakers

    Publication Year: 1992, Page(s):53 - 57
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    The authors illustrate a reliability simulation method used for implantable cardiac pacemakers, and show how such activities influence the product design and warranty strategy. The reliability of a product can be estimated with available techniques during the product development cycle. Accuracy of the reliability predictions can be achieved, but is dependent on the validity and accuracy of the his... View full abstract»

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  • Reliability-growth myths and methodologies: a critical view

    Publication Year: 1992, Page(s):337 - 342
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    It is asserted that reliability prediction is not a reasonable application of the reliability growth concept, and that the various mathematical models introduced may not adequately describe the reliability growth process. It is argued that further understanding of the factors for test planning has not advanced beyond the rules of thumb that were proposed when the concept was initially introduced i... View full abstract»

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  • A smart failure mode and effect analysis package

    Publication Year: 1992, Page(s):414 - 421
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (548 KB)

    A methodology combining the benefits of matrix FMEA (failure modes and effects analysis) and the risk priority number (RPN) technique is presented. The matrix approach is improved to provide an organized and traceable analysis from the piece part failure mode through all indenture levels to system-level failure effects. First, a single synthesized matrix capable of modeling an entire system and st... View full abstract»

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  • Effective maintenance practices to manage system aging

    Publication Year: 1992, Page(s):166 - 170
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (452 KB)

    A study for the Nuclear Regulatory Commission was recently undertaken to identify effective maintenance practices that could be adapted by the nuclear industry in the United States to assist in managing the aging degradation of plant systems and components. Four organizations were examined to assess the influence of maintenance programs on addressing the system and component aging degradation issu... View full abstract»

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