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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  • Historical efforts on R&M integration into engineering curricula

    Publication Year: 1992, Page(s):131 - 133
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    The author describes what the US Air Force has done to achieve improved R&M (reliability and maintainability). The Air Force has been vitally interested in all graduate engineers becoming knowledgeable of R&M so they will be able to readily include R&M in their designs. It is pointed out that R&M must be designed into new systems as they evolve through the complete design process, ... 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
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    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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  • Using causal reasoning for automated failure modes and effects analysis (FMEA)

    Publication Year: 1992, Page(s):343 - 353
    Cited by:  Papers (17)  |  Patents (2)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (824 KB)

    The authors have developed a tool that automates the reasoning portion of a failure modes and effects analysis (FMEA). It is built around a flexible causal reasoning module that has been adapted to the FMEA procedure. The approach and software architecture have been proven. A prototype tool has been created and successfully passed a test and evaluation program. The authors are expanding the operat... 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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  • 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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  • Piece-part reliability-allocation using actual failure data

    Publication Year: 1992, Page(s):119 - 125
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    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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  • 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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  • Reliability-growth analysis for an Ada-coding process

    Publication Year: 1992, Page(s):280 - 284
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (368 KB)

    In a recent software development effort, an ARINC Research Corporation development team translated 500 system transactions into 11000 lines of code in Ada-compilable program design language (PDL). The team established rigorous data collection and review processes to collect and classify defect data and identify reliability growth in the PDL being produced. Two classes of defects for the coding pro... 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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  • A simulation model for maintenance planning

    Publication Year: 1992, Page(s):109 - 118
    Cited by:  Papers (3)
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    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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  • Redundancy design philosophy for catastrophic loss protection

    Publication Year: 1992, Page(s):1 - 4
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (356 KB)

    To ensure high flight safety and mission reliability in flight-critical electronics of aerospace vehicles, a redundancy design technique named brick wall is discussed. Basically, the technique proposes triplex redundant, independent paths where each path can self-monitor its own health (by using a comparison scheme within each path). Upon a fault detection, the whole path is taken offline. The inh... View full abstract»

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  • The effects of root-cause analysis on the utility resource balance

    Publication Year: 1992, Page(s):171 - 176
    Cited by:  Papers (1)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (484 KB)

    The authors describe the development of a model-based approach to the process of determining the root-cause of component failure in power plants. They define the elements needed to analyze heat exchanger failure scenarios and generalize the structure of the analytic and cause-linking processes to formulate a generic methodology. Case studies are cited that demonstrate the validity and necessity of... View full abstract»

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  • Reliability program management: today and tomorrow

    Publication Year: 1992, Page(s):85 - 92
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (624 KB)

    The authors review reliability program activities, management's responsibilities in managing reliability, and a reliability program team concept used at AT&T. The program includes reliability activities in all phases of the product life cycle, from product concept to deployment and field use. The authors highlight this discussion with a major example of reliability program management in the AT... View full abstract»

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  • Reliability growth for typed defects [software development]

    Publication Year: 1992, Page(s):327 - 336
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (636 KB)

    The authors present a reliability growth model for defects that have been categorized into defect types associated with specific stages in the software development process. Modeling the reliability growth of defects for each type separately allows identification of problems in the development process which may otherwise be masked when defects of all types are modeled together. The authors incorpor... View full abstract»

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  • Assuring software safety

    Publication Year: 1992, Page(s):274 - 279
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (488 KB)

    The authors describe several system and design techniques to better assure the development of safe systems. Software safety, which constitutes the `brains' of systems, is the primary focus. Software determines the system reaction to errant input conditions; when the software is not functioning correctly, it can cause the hardware to create a safety mishap. A professional and comprehensive techniqu... 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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  • NASA preferred reliability-practices for design and test

    Publication Year: 1992, Page(s):7 - 11
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    NASA HQ established the NASA R&M Steering Committee (R&MSC) comprised of membership from each NASA field center. The primary charter of the R&MSC is to obtain, record, and share the best design practices that NASA has applied to successful space flight programs and current design considerations (guidelines) that should enhance flight reliability on emerging programs. The practices and ... View full abstract»

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  • New Army method in stating and assessing RAM requirements

    Publication Year: 1992, Page(s):19 - 27
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (736 KB)

    The new US Army method for stating and assess-g RAM requirements is described, with attention given to the definition of RAM attributes, the specification of reliability, the tracking of reliability, the provision of incentives, and the tracking of growth. It is pointed out that the recently introduced Army methodology of specifying reliability both to assess its performance during a given mission... View full abstract»

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  • Methods for communication-network reliability analysis: probabilistic graph reduction

    Publication Year: 1992, Page(s):441 - 448
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (616 KB)

    The authors have designed and implemented a graph-reduction algorithm for computing the k-terminal reliability of an arbitrary network with possibly unreliable nodes. The two contributions of the present work are a version of the delta-y transformation for k-terminal reliability and an extension of Satyanarayana and Wood's polygon to chain transformations to handle graph... 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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  • 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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  • Design for improved maintenance of the fiber-optic cable system

    Publication Year: 1992, Page(s):398 - 406
    Cited by:  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (688 KB)

    The author describes a number of maintenance improvements in the Fiber Optic Cable System (FOCS). They were achieved during a production phase pilot concurrent engineering program. Listed in order of importance (saved maintenance time and material) by maintenance level, they are: (1) organizational level: improved fiber optic converter (FOC) BITE; (2) Intermediate level: reduced FOC adjustments fr... View full abstract»

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  • Integrating life-cycle cost and cost-of-ownership in the commercial sector

    Publication Year: 1992, Page(s):101 - 108
    Request permission for commercial reuse | Click to expandAbstract |PDF file iconPDF (620 KB)

    The author describes two models, the LCC (life cycle cost) model and the COO (cost of ownership) model, and their use as an aid in meeting the objective of creating products that have the lowest LCC for both the manufacturer and the customer. First, the what and why of the LCC analysis process are discussed, and the objectives are defined. The model is described in terms of the major cost elements... View full abstract»

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