Global ETD Search
Search theses and dissertations gathered from participating repositories worldwide. Every result links back to the library that holds it. No account is needed.
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Showing 1 to 20 of 30 for “"Reliability models"”.
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Software Reliability Models
… model. Currently existing popular NHPP process models like Goel-Okumoto (G-O) and Yamada <em>et al</em> models suffer from the drawback that the probability density function of the inter-failure times is an improper density function. This is because the event no failure in (0, oo] is allowed in …
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Reliability models of load testing
Three main topics related to structural reliability and load testing are investigated in this dissertation. These consist of evaluation methods for reliability analysis given test information, advanced strength modeling based on material tests, and practical implementation of reliability models of …
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Software reliability prediction
… and reasons for investigating software reliability models as a tool in the decision making process are outlined. There follows a short review of software reliability models, with the Littlewood and Verrall Bayesian model considered in detail. The difficulties in using this model to …
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Development of decision support system for reliability
Reliability analysis is now an essential part of any product development. In the field of Electrical Engineering, reliability models are developed and analyzed for every component before it comes to market. The complexity of the product can range from a simple transistor to an integrated circuit …
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Uncertainty analysis in software reliability of component-based systems
Several architecture-based software reliability models were proposed in the past. These models compute the point estimate of system reliability by plugging point estimates of unknown parameters into the model. These models however, discard the uncertainty of the parameters, that is, they do not …
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Stent Reliability and Maintenance: Integrating Probabilistic and Physics-of-Failure Models
… new challenges to the failure analysis and reliability study of such new devices. More than one million stents are implanted in human arteries each year. These devices are subject to a wide range of stress due to biological and procedural factors. Fatigue and structural damage can occur to …
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An Infrastructure for Worldwide Parallel Computing
… In addition, we validate our performance/reliability models via experiments, show that the time scale of world view maintenance and task scheduling are on the order of minutes, and that prediction techniques can enable the maintenance of a distributed hierarchy for large scale application …
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Reliability Analysis And Optimal Maintenance Planning For Repairable Multi-Component Systems Subject To Dependent Competing Risks
… components that interact in a complex manner. Reliability analysis of multi-component repairable systems plays a critical role for system safety and cost reduction. Establishing reliability models and scheduling optimal maintenance plans for multi-component repairable systems, however, is still …
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Software Reliability Issues: An Experimental Approach
… whereby the predictive performance of software reliability models can be analyzed and improved under laboratory conditions. This procedure substitutes the averages of large sample sets for the single point samples normally used as inputs to these models and thus supports scrutiny of their …
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Software reliability prediction : a multi-modelling approach
Many software reliability models are now available to the user who wishes to assess and make predictions about the future reliability of his/her system by using its past failure behaviour. Experience of applying such models to failure data in the past has shown that, to date, there is no one model …
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Software tool for reliability estimation
Reliability engineering is now an essential part of product development. In the area of electronics, reliability needs to be checked for each critical component before the product is shipped. Electronic products can range from computers to pace makers.;Over the years, several tools have been …
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Software reliability prediction
… parameter estimates of a number of software reliability models. On the basis of the results from analysing 7 sets of real data, these methods are found to be both efficient and reliable. The simple approach of adapting software reliability predictions by Keiller and Littlewood (1984) can …
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The Impact of Reliability in Conceptual Design - An Integrated Trade-off Analysis
… presented in this paper focuses on developing models to estimate the systemreliability of Unmanned Ground Vehicles using knowledge and data from similar systems. Traditional reliability approaches often require detailed knowledge of a system and are used in later design stages as well as …
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Empirical assessment of architecture-based reliability of open-source software
A number of analytical models have been proposed earlier for quantifying software reliability. Some of these models estimate the failure behavior of the software using black-box testing, which treats the software as a monolithic whole. With the evolution of component based software development, the …
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Techniques for Reliability and Robustness in Integrated Electronic and Photonic Systems
Reliability and robustness are key concerns in the development of novel electronic and photonic materials, devices, and systems. This thesis presents statistical and machine learning techniques for reliability analysis of heterogeneously-integrated systems, extraction of variations from photonic …
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A reliability model incorporating software quality metrics
… past decade have posed a problem in terms of the reliability of the software. The size and complexity of software that is being developed is growing rapidly and integrating diverse pieces of software in the operational environment also poses severe reliability issues, resulting in increased …
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Analysis of costs and delivery intervals for multiple-release software
… taking into consideration software costs and reliability. The Multiple-Release methodology extends existing software cost and reliability models, meets the needs of large software development firms, and gives a navigation guide to software industrial managers. The main decision factors for the …
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The effect of overloading on reliability of wheel loader structural components
… effect of overloading the bucket on wheel loader reliability. The specific objectives of the research are to: 1) evaluate the effect of overloading the bucket on wheel loader productivity; 2) examine the effect of overloading the bucket on hydraulic pressures in the hoist cylinders (used as a …
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Consistency checks in decision analysis
… with these events can be addressed using reliability models or PSA, the actual path and decisions made concerning the appropriate outcome is not readily obvious. Decisions are made on the basis of importance of cost, health and safety to the decision maker. These decisions include external …
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A tool for reliability analysis of electrical power systems
In this thesis, a computer tool for reliability analysis of electrical energy systems is presented. The tool is implemented in MATLAB/Simulink/PLECS and incorporates the concept of fault coverage, which is the probability that, given a fault has occurred, the system remains operational within some …
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