Showing papers in "Reliability Engineering in 1986"

TL;DR: In this paper, the authors present a survey of the models that have been suggested for such systems and the maintenance and replacement policies for their operation which such models propose, including economic, structural and/or failure related.

TL;DR: In this article, an interactive, computer-based facility has been developed for the investigation of fault propagation in process plants, including fault tree synthesis and alarm system design, while fault propagation has application not only to design methods such as hazard and operability studies and fault trees but also to computer alarm and trip systems.

TL;DR: In this paper, the authors describe the digraph method of fault tree construction and its application to the process stream of a butane vaporiser, and show that an accurate, well-structured fault tree can be produced for a process system which incorporates a number of control loops.

TL;DR: The method starts with the system success determinant obtained from the connection matrix and expands it using the simple rules defined in the text using the concepts of Boolean algebra and graph theory.

TL;DR: In this paper, a computer-based method and an interactive computer facility have been developed for the investigation of fault propagation in process plants, including fault tree synthesis and alarm system design.

TL;DR: In this paper, an interactive, computer-based facility has been developed for the investigation of fault propagation in process plants, including fault tree synthesis and alarm system design, which is described in companion papers.

TL;DR: In this article, the authors deal with how to apply proportional hazards modelling in practice to reliability data and discuss the difficulties of analysis and interpretation of results for both repairable and non-repairable systems.

TL;DR: In this article, Markov Monte Carlo methods for reliability calculations are generalized to include inhomogeneous Markov processes, and two new sampling techniques allow the treatment of time-dependent failure rates and preventive maintenance.

TL;DR: In this article, the authors present two new component importance measures for a flow network system with random arc capacities: (1) system availability improvement potential of the component; (2) expected unutilized capacity of component.

TL;DR: In this article, a short review of available computer-aided methods for system reliability assessment, the DYLAM technique is proved to be a more adequate tool than the normally used fault trees/event trees.

TL;DR: In this article, an interactive, computer-based facility has been developed for the investigation of fault propagation in process plants, including fault tree synthesis and alarm system design, which is used for a pump system changeover sequence.

TL;DR: Mathematical expressions are presented for the probability distributions and related statistical parameters, such as mean value and standard deviation, of system downtime and resulting loss of production caused by irregular equipment failure and repair.

TL;DR: In this paper, a 75-ton chiller unit (CU) on board a destroyer is analyzed and the optimal inspection interval has been obtained and this results in reducing the maintenance cost and keeping the equipment safe.

TL;DR: In this paper, the authors describe common statistical structures of diverse reliability field data and how to explore and identify the structure in order to analyse the data appropriately, and explore the possibility of other abnormal structure in reliability time between failure data of repairable equipment.

TL;DR: In this paper, the reliability of machine tools in both the United Kingdom and Turkey was investigated by a combination of questionnaire and personal interviews supported by several detailed case studies of individual manufacturing componies, concluding that ignorance of the true situation, compounded by a far from happy technological situation, is causing difficulties which ensure that the maximum return on invested capital is not being achieved.

TL;DR: During the last ten years different generalizations of the total time on test (TTT) concept have been defined and studied and these concepts have proved to be very useful tools in many different applications in reliability.

TL;DR: In this article, the authors present some of the practical difficulties which typically require negotiating in field data collection, reduction, and statistical analysis, primarily at the component level, and present some solutions to these difficulties.

TL;DR: A simple method for obtaining the performance index of a computer network, defined as the weighted reliability where the capacity of a link is integrated with its probability of being good.

TL;DR: In this article, a probability model is developed to predict the frequency with which defects occur in similar equipment fitted to a fleet, and a method of parameter estimation is given, together with illustrative examples demonstrating how reliability calculations may be made from left-censored data under conditions of increasing failure rates.

TL;DR: The paper reviews the use of expert systems in this type of application and contrasts the different requirements for support of decisions in both routine operation and rare event handling.

TL;DR: In this paper, a classification system has been developed to provide a logical method for the dissection and reconstruction of malfunction scenarios, and to identify the constituent elements of a scenario in a concise and unambiguous terminology.

TL;DR: In this paper, a review of statistical techniques for extreme values is presented, and some more recently developed techniques based on exceedances over a threshold are presented, with some examples of applications of threshold methods and some comparisons with classical methods.

TL;DR: In this article, the failure data were analyzed using global models generated from the lognormal, inverse Gaussian and Weibull distributions using an Arrhenius reaction rate model.

TL;DR: In this article, a new code, called VULCAN/STADIC-2, was developed to aid the probabilistic risk of the spread of fire damage within a large enclosure.

TL;DR: In this paper, the product rule is applied to evaluate the system reliability through the RBD (reliability block diagram) of MC's and the method to calculate the system failure frequency is developed in parallel.

TL;DR: This paper presents online error detection techniques which can be built into the database management system (DBMS) using a hierarchical model of a DBMS and a classification of errors is outlined as a basis for the design oferror detection techniques.

TL;DR: In this paper, the effect of truncating the range of random variables on their life expectancy was investigated and simple properties of the mean residual life were developed, and Graphical methods of interpreting the empirical Mean Residual Life (MRL) were illustrated and shown to help in model selection.

TL;DR: This paper discusses failure diagnosis by fuzzy expert systems, where a dialogue between a human specialist and an expert system is partially guided by the intelligence interface of the expert system.

TL;DR: In this article, the problem of determining the optimal number of redundant units in parallel systems with common mode failures was considered and cost models were obtained considering both the common mode and the component's random failures.