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The product warranty has become an indispensable facet of business operations. Burn-in is effective at eliminating infant mortality and improving operational reliability levels for consumers. This paper considers the influence of different failure states and different phases of product reliability and warranty policies on warranty costs from predelivery inspection to the end of the warranty period...
The failure detection rate (FDR) is the most common testability index used to evaluate the equipment testability level. According to the testability test theory of FDR, a widespread supposition is that the FDR value of a system is an unknown constant. However, there have been a few attempts to research the sample property of failure detection and the statistical characteristics of FDR to prove this...
This paper proposes a practical time-phased model to analyze the vulnerability of power systems over a time horizon, in which the scheduled maintenance of network facilities is considered. This model is deemed as an efficient tool that could be used by system operators to assess whether how their systems become vulnerable giving a set of scheduled facility outages. The final model is presented as...
Over the past decade, software has spread to most areas of our lives. This has led to increased demands on product quality and complexity. Industrial software which belong to a safety-critical area where high quality products are essential. Many processes and standards must be completed and met within stipulated deadlines. The complexity of the software and the boundary conditions of developing it...
By taking common mode failure (CMF) into account, the availability of multiple cluster systems is investigated. Firstly, a Markov model of system with three cluster nodes is constructed with failure rate (λ), repair rate (µ) and CMF rate (γ). Then, the availability of system is formulated with related parameters by solving related equations. Furthermore, derivative analysis of the formula's property...
Semiconductor manufacturing is a very costly and time-consuming process and any reduction in cycle time (CT) can result in a significant cost saving due to shorter time-to-market, reduced inventory and improved yield. This paper examines the topic of PM (Preventative Maintenance) segregation where the goal is to determine the optimum PM frequency that results in reduced fab CT. Much of the literature...
The paper demonstrates the use of a Discrete Event Simulation tool to reduce the negative impact of machine failures on the performance of a filling line. The buffer allocation problem has received a lot of attention, but still there are examples of unreliable production systems for which a buffer can be allocated in order to increase their productivity. The subject of the study is a filling and packaging...
This research investigates a k-out-of-n system in which the lifetime of operational and standby components, the repair time follow continuous phase-type (PH) distribution, instead of exponential distribution or others typical distributions. The proposed paper provides an analytic reliability model that is more suitable to characterize the real situation. The stationary distribution is built by using...
Considering maintenance resources assignments of the large-scale complex equipment, the policy that single repairman has multiple vacations is utilized to analyze a warm standby repairable system. The former models that the known conditions are usually assumed to follow exponential distribution or other typical distributions have many constraint conditions. It is assumed that the online component...
This paper proposes a GO method by taking into consideration the typical characteristics. Then, taking a hoisting mechanism as an example, its steady state availability analysis and qualitative analysis are conducted based on this paper's GO method. In order to illustrate the advantages, reasonability, and feasibility of GO method, the results calculated by GO method are compared with the result of...
In equipment joint support, support tasks generated by different equipment share the resource of the support sites. Compared to conventional support system, more categories of support objects leads to a sharp increase in the number and randomness of support tasks. This makes the progress of some support activities affected by the resource occupation of other activities. In other words, the availability...
According to the current transformer substation, there are a lot of problems, like a variety of complicated information, difficulty of effectively assessing and making decisions based on artificial experience. Therefore, a method of substation intelligent decision evaluation based on fuzzy analysis and decision theory is proposed in this paper. Firstly, all kinds of complex information in substation...
Lack of Electricity is the major problem faced by developing nations. Out of 571742 villages in India 25722 villages are unelectrified according to recent report by Central Electricity Authority of India. With 30% subsidy provided by the Indian government, electrification through solar PV system in rural areas is economical considering their terrain. Although the average life cycle of PV panel is...
The purpose of this paper is to evaluate remaining useful life (RUL) of machine tools, which is a key indicator for equipment maintenance and health management. The proposed method takes the factors of reliability, maintainability and economy into account and constructs the evaluation index system based on analytical hierarchy process (AHP) method. Euclid approach degree is then calculated through...
The paper proposes a new time sequential multilevel Monte Carlo (MLMC) method for estimating distribution system reliability. Usually, the reliability indices of a distribution system are accurately assessed by sequential Monte Carlo simulation (MCS). A disadvantage of sequential MCS is the computational burden which may be prohibitive for achieving a high accuracy. The aim of the proposed method...
System availability-based design optimization is closely linked with its economy. Under conditions that the life of components follows Weibull distribution, design cost function, manufacturing cost function and maintenance support cost function are presented respectively for a multi-unit system which is composed of identical units. Based on the principle of cumulative failure probability equality,...
Reliability modeling is an important part of reliability research, which has important guiding significance for evaluating system reliability index and optimizing preventive maintenance strategy. Maintenance behaviors, such as maintenance and replacement of system components, etc. have great influence on the reliability of repairable system. But the commonly used reliability distribution models ignore...
In the design and allocation of resilience for complex networks, both the resilient characteristics and the locations of constituent components can affect the overall resilience of networks on different levels. Based on the concepts of resilience, this paper proposes the definitions of structure importance, redundancy importance and reinforcement importance, with comprehensive consideration of performance...
Deduplication has been widely used to improve storage efficiency in modern primary and secondary storage systems, yet how deduplication fundamentally affects storage system reliability remains debatable. This paper aims to analyze and compare storage system reliability with and without deduplication in primary workloads using real-world file system snapshots. Specifically, we propose a trace-driven,...
This paper based on the theory of reliability centered maintenance (RCM) techniques aimed to verify the analysis results obtained by GO-Bayes method. This paper addresses the problem of establishing Monte Carlo simulation model to simulate the braking system. Metro vehicle braking system has been selected as it is one of the most complex and high-technology systems among all devices of train vehicles...
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