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Reliability, IEEE Transactions on

Issue 4 • Date Oct. 1978

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Displaying Results 1 - 25 of 41
  • [Front cover]

    Page(s): c1
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  • IEEE Reliability Group

    Page(s): nil1
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  • [Breaker page]

    Page(s): nil1
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  • What & Why

    Page(s): 241
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  • How

    Page(s): 241
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  • Top-down Algorithm for Obtaining Prime Implicant Sets of Non-Coherent Fault Trees

    Page(s): 242 - 249
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    An algorithm for finding all the prime implicant sets is given for non-coherent fault trees involving gates other than simple AND and OR, e.g., EOR and NOT. The sets are a generalization of min cut sets and can be used in quantitative and/or qualitative system reliability analysis. The algorithm is a top-down analysis and avoids sum of product expressions of top event, which usually involve a large number of terms. Each step of the algorithm is clearly defined and it is proven that all prime implicant sets can be obtained. The algorithm is efficient, and rather complicated trees can be handled manually. View full abstract»

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  • Manuscripts Received

    Page(s): 249
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  • FATRAM-A Core Efficient Cut-Set Algorithm

    Page(s): 250 - 253
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    Many algorithms have been developed for determining minimal cut sets for logic models (in particular, fault trees). Although these methods are theoretically correct, computer implementation of these algorithms proves them less efficient than is desirable. This paper presents a new method for determining the minimal cut sets, which makes more efficient use of computer memory. The gates are resolved in a deterministic manner according to the following rules: 1) AND gates and OR gates with gate inputs are resolved; and 2) OR gates with only basic event inputs are resolved last. Other computer techniques provide increased efficiency for implementing this method. The FATRAM algorithm for finding minimal cut sets for fault trees does use computer core memory effectively. The use of stacks (last-in first-out arrays) for the AND and OR gates has also increased the efficiency of the program. The use of dynamic storage makes the program more flexible. View full abstract»

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  • Manuscripts Received

    Page(s): 253
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  • Computerized Approach for Matrix-Form FMEA

    Page(s): 254 - 257
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    This paper discusses a computerized technique for preparing a matrix-form of failure modes and effects analysis which has previously been completed using manual methods. The basic input to the computer is a definition of each element of the system, applicable failure modes, and the resultant effect of each failure mode. From this input, the computer develops the matrix, locates the intersections on the matrix between elements of the system and effects, and formulates the text of the failure effects. The principal advantages in using the computer include lower cost, greater accuracy, faster preparation, overall consistency in the final effect statements, and elimination of many repetitious and tedious tasks. View full abstract»

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  • Book Review

    Page(s): 257
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  • On Product Reliability Under Random Field Loads

    Page(s): 258 - 260
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    This paper presents a simple design problem to illustrate the relationship between product reliability and design strength for the case where product failure is due to a single overload in a sequence of loads applied during the mission of the product. View full abstract»

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  • [Advertisement]

    Page(s): 260
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  • A Rapid Algorithm For Reliability Optimisation Of Parallel Redundant Systems

    Page(s): 261 - 263
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    A rapid method is proposed for optimization of reliability of multiconstraint parallel redundant systems. The constraints need not be linear. This method provides good starting values, which are close to the boundary of the feasible region, for the number of redundant units in each subsystem. No proof has been presented to establish the optimality obtained by this method. Yet for examples tried out this method provides optimal or near optimal solutions. View full abstract»

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  • Books Received for Review

    Page(s): 263
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  • Interactive Optimization of System Reliability Under Multiple Objectives

    Page(s): 264 - 267
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    This paper considers a multiobjective reliability allocation problem for a series system with time-dependent reliability. The method determines the most preferable reliability allocation and preventive maintenance schedule. The problem is multiobjective nonlinear mixed-integer. The decision making procedure is based on interactive optimization and a nonlinear programming algorithm. The method is illustrated by a numerical example. View full abstract»

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  • Annual Reliability & Maintainability Symposium Proceedings Price List for 1978

    Page(s): 267
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  • Approximate Calculation of Block Replacement with Weibull Failure Times

    Page(s): 268 - 269
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    A block replacement policy with Weibull failure times is considered. It is troublesome to compute an optimum planned replacement time numerically. An asymptotic calculation is given in terms of pdf and the failure rate. A numerical example shows that under some conditions the formulas help approximate an optimum time. View full abstract»

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  • Manuscripts Received

    Page(s): 269
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  • Optimum Ordering Policies with Lead Time for an Operating Unit in Preventive Maintenance

    Page(s): 270 - 271
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    An ordering policy allows a spare, delivered after a constant lead time, to be put into inventory. Under certain conditions there exists a finite and unique ordering policy maximizing the cost effectiveness, which balances the system effectiveness and the cost and is defined as [s-availability]/[s-expected cost rate]. View full abstract»

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  • Manuscripts Received

    Page(s): 271
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  • Two Criteria for Preventive Maintenance

    Page(s): 272 - 273
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    The purposes of this paper are to model the effects of imperfect maintenance, and from the model to derive conditions under which preventive maintenance is beneficial. The criteria are derived via: 1) maximization of the steady state availability and 2) minimization of the s-expected cost per unit time over an infinite time span when the maintenance times are non-zero. View full abstract»

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  • Manuscripts Received

    Page(s): 273
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  • Life Data Analysis for Units Inspected Once for Failure (Quantal-Response Data)

    Page(s): 274 - 279
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    This expository paper describes simple graphical and advanced maximum likelihood methods for estimating the life distribution of units that are inspected once and found failed or running. View full abstract»

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  • [Advertisement]

    Page(s): 279
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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.

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Meet Our Editors

Editor-in-Chief
Way Kuo
City University of Hong Kong