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IEEE Transactions on Reliability

Issue 2 • Date June 1992

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Displaying Results 1 - 24 of 24
  • Comment on "Modeling a shared-load k-out-of-n*G system

    Publication Year: 1992
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (84 KB)

    The commenter states that there is no reason to perform the steady-state analysis as attempted by J. Shao and L.R. Lamberson (see ibid., vol.40, no.2, p.205-9, June 1991) for a Markov chain that has an absorbing failure state. Corrected expressions are provided.<> View full abstract»

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  • The SURE approach to reliability analysis

    Publication Year: 1992, Page(s):210 - 218
    Cited by:  Papers (20)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (680 KB)

    The SURE computer program, a reliability-analysis tool for ultrareliable computer-system architectures, provides an efficient means for computing reasonably accurate upper and lower bounds for the death state probabilities of a large class of semi-Markov models. Once a semi-Markov model is described using a simple input language, SURE automatically computes the upper and lower bounds on the probab... View full abstract»

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  • Graphical representation of two mixed-Weibull distributions

    Publication Year: 1992, Page(s):241 - 247
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (412 KB)

    A variety of shapes of two-Weibull mixtures on Weibull probability paper are explored and classified into six types of Cdf curves (A-F). Types B-D represent Cdf's composed of two well-mixed subpopulations. Type F represents the Cdf composed of two very well-separated subpopulations. Types A and E are in between types B-D and type F. The Kao-Cran graphical parameter estimation method cannot be appl... View full abstract»

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  • Bayes binomial sampling by attributes with a general-beta prior distribution

    Publication Year: 1992, Page(s):310 - 316
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    In binomial sampling the standard beta is frequently used as a prior due to its conjugate property for a sample from a Bernoulli distribution. This article looks into the case when this prior is a general beta. Practical advantages in the elicitation of expert opinion (to obtain the prior) and a convenient expression of the posterior are presented. A computer program (in double precision) on an IB... View full abstract»

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  • Failure mechanism models for plastic deformation

    Publication Year: 1992, Page(s):168 - 174
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (500 KB)

    A tutorial illustrating designs in which plastic deformation can endanger system performance, thereby acting as an overstress failure mechanism, is presented. Analytic methods, based on continuum mechanics, are presented to design against such failures. Examples illustrate the use of these models in practical designs encountered in mechanical systems and in electronic packaging View full abstract»

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  • An automated oracle for software testing

    Publication Year: 1992, Page(s):272 - 280
    Cited by:  Papers (16)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (740 KB)

    The theory, the design, and an example implementation of an automated oracle are presented. A software testing environment that is a collection of recently developed state-of-the-art tools and techniques that constitute an automatic module verifier is discussed. Requirements are analyzed by using a formal specification language, called IORL, whose realizations are compilable View full abstract»

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  • An O(kn) algorithm for a circular consecutive-k-out-of-n:F system

    Publication Year: 1992, Page(s):303 - 305
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (232 KB)

    An O(k×n) algorithm is described for evaluating the reliability of a circular consecutive-k-out- n:F system View full abstract»

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  • Throughput availability in Markov systems

    Publication Year: 1992, Page(s):219 - 224
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (332 KB)

    Explicit formulations for throughput availability, demand availability, on-stream availability, availability at a particular level and time, limiting throughput availability, and mean throughput to first failure are developed in terms of discrete and continuous parameter Markov chains. These measures are particularly adapted to continuous production or transportation systems. A numerical example i... View full abstract»

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  • Maximum likelihood estimates, from censored data, for mixed-Weibull distributions

    Publication Year: 1992, Page(s):248 - 255
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (592 KB)

    An algorithm for estimating the parameters of mixed-Weibull distributions from censored data is presented. The algorithm follows the principle of the MLE (maximum likelihood estimate) through the EM (expectation and maximization) algorithm, and it is derived for both postmortem and non-postmortem time-to-failure data. The MLEs of the nonpostmortem data are obtained for mixed-Weibull distributions ... View full abstract»

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  • Reliability comparison of token-ring network schemes

    Publication Year: 1992, Page(s):288 - 293
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (376 KB)

    In the token ring network, failure of any one node brings the network down. Three schemes have been proposed for enhancing the reliability of such a ring network: bypass switch, braided, and counter rotating. The reliability characteristics of these schemes are compared. While each scheme enhances the reliability of the basic ring network, their capabilities are not the same. In particular, the by... View full abstract»

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  • Reliability of fully and partially replicated systems

    Publication Year: 1992, Page(s):175 - 182
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (544 KB)

    The reliability of two replication methods, partial and full, is analyzed for a two-process/four-processor case. Three types of systems are analyzed and compared: no repair, finite repair-rate and instantaneous repair. These systems are modeled using discrete-state continuous-time Markov chains. The condition under which a partially replicated system might yield a better reliability than that of a... View full abstract»

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  • Fixed-time life tests based on fuzzy life characteristics

    Publication Year: 1992, Page(s):317 - 320
    Cited by:  Papers (2)  |  Patents (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (228 KB)

    The authors deal with a reliability demonstration test with type-I censoring and present a formulation based on fuzzy-set theory. Acceptable and rejectable MTBFs are presented in terms of a fuzzy concept, and the Bayes theorem plays an important role in the formulation. The proposed life test is useful when it is difficult to specify acceptable and rejectable MTBFs strictly View full abstract»

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  • Parallel algorithms for terminal-pair reliability

    Publication Year: 1992, Page(s):201 - 209
    Cited by:  Papers (12)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (720 KB)

    The parallelization of the two best-known sequential algorithms, that of W.P. Dotson and J.O. Gobein (1979) and that of L.B. Page and J.E. Perry (PP-F2TDN) (1989) for computing the terminal-pair reliability in a network is discussed. Reduce and Partition (R and P), a novel sequential algorithm which combines the best efficient features of these two algorithms, is presented. It is shown that R and ... View full abstract»

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  • A decomposition method for optimization of large-system reliability

    Publication Year: 1992, Page(s):183 - 188
    Cited by:  Papers (6)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (444 KB)

    The authors consider a decomposition approach for optimization of the reliability of a large system with a general network structure. A three-level methodology is developed for optimal allocation of available resources among subsystems in order to ensure maximization of system reliability. The decentralized nature of this methodology greatly reduces the complexity of the large problem and facilita... View full abstract»

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  • On Onaga's upper bound on the mean values of probabilistic maximum flows

    Publication Year: 1992, Page(s):225 - 229
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    The reliability of capacity-limited networks subject to arc failures is evaluated by the mean value of maximum flow. Calculating the mean value of maximum flow is NP-hard. However, the Onaga upper bound sometimes gives the exact value, e.g. when graphs are bipartite. The authors give, for networks, whether arcs are directed or not, a necessary and sufficient condition for the Onaga upper bound to ... View full abstract»

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  • Bayes attribute acceptance-sampling plan

    Publication Year: 1992, Page(s):307 - 309
    Cited by:  Papers (3)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (184 KB)

    The authors briefly review an approach for choosing a prior distribution for a Bayes attribute (good/bad) acceptance-sampling plan. A prior is chosen from confidence levels corresponding to classical lower confidence bounds. Where a Bayes plan is acceptable, the sample size can be reduced View full abstract»

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  • Extended tables for the moments of gamma-distribution order statistics

    Publication Year: 1992, Page(s):256 - 271
    Cited by:  Papers (2)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (960 KB)

    The authors tabulate expectations, variances, and covariances of order statistics from a sample of size n from a standard gamma distribution with shape parameter r. The expected values are n=1(1)10(5)40 and r =5(1)8; the covariances are n =15(5)25 and r=2(1)5 View full abstract»

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  • Analysis of a fault-tolerance scheme for processor ensembles

    Publication Year: 1992, Page(s):294 - 302
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (732 KB)

    The authors analyze a locally redundant scheme (LR scheme) for designing fault-tolerant processor ensembles. A switching structure for reconfiguration is presented, and a detailed model for the yield analysis off the LR scheme that takes into account processor, switch, and link failures is developed. A negative binomial distribution is used for the yield statistics, as it best fits the empirical d... View full abstract»

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  • Optimization models for selection of programs, considering cost and reliability

    Publication Year: 1992, Page(s):281 - 287
    Cited by:  Papers (8)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (448 KB)

    The authors present two optimization models for decision support tools for selecting available programs in the market. Information on reliability and cost of the available programs are considered as basic criteria for the selection. These models apply to software packages that consist of several programs where each, upon execution, performs a different function as required by the user. The objecti... View full abstract»

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  • Usefulness of MTTF of s-independent case in other cases

    Publication Year: 1992, Page(s):196 - 200
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (308 KB)

    It is a plausible conjecture that for many cases of statistical dependence, the system MTTF (mean time to failure) is nearly that for statistically independent components. The author deals with Markov k -out-of-n:F systems, for which the degree to which the above conjecture is true could be clarified satisfactorily. In order to get an approximate value of system unavailability to... View full abstract»

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  • Lower confidence bound on the percentage improvement in comparing two failure rates

    Publication Year: 1992, Page(s):239 - 240
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (156 KB)

    It is often necessary to determine whether a design change in a product has actually improved its failure rate, and to compute a lower confidence bound on the percentage of failure rate improvement affected by the change. It is shown that such a bound can be computed based on certain test data. The main result is a special case on an equivalent result derived in Lehmann (1959) for hypothesis testi... View full abstract»

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  • A Monte Carlo simulation algorithm for finding MTBF

    Publication Year: 1992, Page(s):193 - 195
    Cited by:  Papers (5)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (212 KB)

    Prediction of mean time between failures (MTBF) is an important aspect of the initial stage of system development. It is often difficult to predict system MTBF during a given time since the component failure processes are extremely complex. The authors present a Monte Carlo simulation algorithm to calculate the MTBF during a given time of a binary coherent system. The algorithm requires the lifeti... View full abstract»

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  • Reliability analyses for a tree-structured hierarchic control system

    Publication Year: 1992, Page(s):190 - 192
    Cited by:  Papers (1)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (172 KB)

    Mathematical models for reliability calculations of a three-level centralized control system are given. The highest level is a central control unit which sends control messages to peripheral control units that process them and transmit appropriate instructions to the lowest level, the terminal units. The following probabilities are defined, modeled, and calculated: operating terminal reliability, ... View full abstract»

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  • Preventive replacement in systems with dependent components

    Publication Year: 1992, Page(s):230 - 238
    Cited by:  Papers (14)
    Request permission for commercial reuse | Click to expandAbstract | PDF file iconPDF (560 KB)

    A multicomponent series system includes a component which deteriorates over time, changing its operating characteristics and, consequently, increasing the failure rates of neighboring components. Preventive replacement of the deteriorating component can be beneficial. Replacement policies that include inspecting the deteriorating component at system failure instances and replacing it if the deteri... View full abstract»

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Aims & Scope

IEEE Transactions on Reliability is concerned with the problems involved in attaining reliability, maintaining it through the life of the system or device, and measuring it.

Full Aims & Scope

Meet Our Editors

Editor-in-Chief
W. Eric Wong
University of Texas at Dallas
Advanced Res Ctr for Software Testing and Quality Assurance

ewong@utdallas.edu