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Recently, the sustainability of traditional technologies employed in critical infrastructure brings a serious challenge for our society. In order to make decisions related with safety of critical infrastructure, the values of accidental risk are becoming relevant points for discussion. However the challenge is the reliability of the models employed to get the risk data. Such models usually involve...
Making decisions in complex systems it is a complicated task to accomplish. As complexity and uncertainty increase, the use of scenarios to exploring that uncertainty becomes essential to support decision makers. The difficulty associated with the combinatorial need imposed by complex systems requires methods and tools to unburden analysts from the cumbersome task of manually deriving scenarios and...
In the knowledge age, as knowledge becomes the main determinant of organizational success, organizational safety becomes increasingly dependent on knowledge management systems. As a management process, Knowledge Management includes capturing, developing, sharing and effectively using organizational knowledge. For organizational effectiveness; approaches of knowledge management, systems of organizational...
Different state indicators are used when assessing technical systems. If we are to use indirect diagnostic measures, lubrication oil seems to be a good source of different information. It is possible to get the information on the state of the oil and the system. In our article we focus on specific oil particles, i.e. soot. It is formed as a by-product during fuel combustion. Soot contaminates the...
Hybrid forging combines forming of bulky and sheet metal elements in one process step. During the forming of the bulky and sheet metal elements a joining operation is initiated by the energy provided by the forging operation. Thereby component areas with high loads can be designed using a bulky element whereas areas with lower loads can be designed using a sheet metal element. In consequence, significant...
A modified hybrid imperfect maintenance model (MHIM) for machine working in piecewise constant operational condition (PCOC) is proposed considering the limitation of traditional age-based hybrid imperfect maintenance model, with the assumption that failure time in different operational condition (OC) satisfies accelerated failure time model (AFTM). Method for estimating the parameters also has been...
As oil and gas industry expands into the Arctic, operators struggle to reduce risks and improve safety, while keeping the cost of inspection and repair to a minimum level. One of the most effective ways to minimize the inspection and repair costs is to apply risk-based inspection (RBI) methods and tools. To identify, assess and map risk of failure of equipment, a number of RBI models, techniques and...
Economic affordability is a crucial factor for repairable systems. Previous work about economic life prediction of systems mainly concerned about cost models, regardless of system structure or components' relationship. In this paper, a new economic life prediction method has been proposed with combination of a maintenance model and an accumulative damage model. The maintenance model is to depict the...
Load-sharing processes are commonly used to model systems with dependent components. The exponential distribution is widely used in load-sharing systems to model the component lifetimes because of its memoryless property. Testing the exponentiality in load-sharing systems is a challenging task due to the dependent components. In this article, we develop a conditional Monte Carlo test based on a sufficient...
A two dimensional maintenance contracts with coordcination between two parties is studied in this paper. The contract is applied to a dump truck operated in a mining industry. The situation under study is that an agent offers two dimensional service contract to the owner of the truck. The owner's decision to get high availability and the agent's decision to minimize the total maintenance cost are...
ISO55000 is the International Organisation for Standardization (ISO) standard for asset management published in 2014. It stipulates that effective control and governance of assets by organizations is essential to realize value through managing risk and opportunity, in order to achieve the desired balance of cost, risk and performance. It is a challenge to industries on how to address this. This paper...
Mission success probability means the ability of a system to fulfill its mission in a prescribe task profile. In this paper, a hierarchical modeling method is proposed for the mission success evaluation of multi-stage system with repairable spare parts. The binary decision diagram (BDD) was used to represent the system structure function. The component and its corresponding repairable spare parts...
This paper highlights the performance of electrical equipment and discovers any unspecified breakdowns at the electrical equipment. It focuses on the damages that are caused by electrical equipment failures. Moreover, it gives practical solutions and recommendations of how to improve electrical equipment reliability in arm loading system to prevent delay of oil shipment. The report also relied on...
We need energy resources to assure performance of mechatronic systems. The performance assurance is of major importance in present systems since it leads to high availability and capability. It also helps to reduce failure occurrence. In the article we want to find the up state time of Li-ion batteries. Results are related to influence of the operating environment at different climatic levels. We...
The increase of high-cost and high-precision manufacturing process underlines the importance of the reliability estimation of Bogey test data. To estimate the failure probability of Bogey test, Bayesian approaches often focus on the choice of the prior distribution. However, this paper develops a new method, which making use of the concavity of lifetime's distribution function to construct a non-informative...
When using acceleration in a degradation test, additional parameters are needed to incorporate the accelerating variables into the degradation process, requiring more statistical information to achieve the same level of estimation precision. When the increase of statistical information due to acceleration fails to compensate the information consumption caused by the additional parameters, acceleration...
This paper deals with the supply planning for two level assembly systems under stochastic lead time and random failure machine. The objective is to determine the optimal supply planning of the assembly system while considering the maintenance actions and then to study their impact on the optimal release dates for the components at level 2. The optimal supply planning minimizes the total cost which...
This paper analyzes the possibility of applying model that is not explicitly incorporate competition in hotel Revenue Management. Three scenarios are evaluated; (i) each seller understands how its own price affects its own demand but does not directly account for how its competitor's price does, (ii) each seller knows the total market size, and tries to learn how its own price affects demand, while...
The increasing importance of services in high-wage countries calls for a detailed examination of service productivity and complexity in current research projects. This paper describes the development of a measurement model with regard to service productivity and complexity of emergency medical services. While the measurement model of service productivity is partly literature-based, a novel construct...
The purpose of this study is to understand how positive and negative factors influence people on performing electricity-saving behaviors in households based on the MOA theory and “Green Consumption Behavior Model”. Research data were collected through a professional market survey, in which the 1,067 sampling respondents represent the characteristics of Taiwanese population. This study found that,...
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