نتایج جستجو برای: failure process modeling
تعداد نتایج: 1958576 فیلتر نتایج به سال:
The Unified Modeling Language (UML)1 is a visual, object-oriented, and multipurpose modeling language. Primarily designed for modeling software systems, it can also be used for business process modeling. Since the early 1970s, a large variety of languages for data and software modeling like entity-relationship diagrams [2], message sequence charts [5, 10], state charts [9], and so on, have been...
This paper presents an extension of Bayesian networks (BN) applied to reliability analysis of an open gas generator cycle Liquid propellant engine (OGLE) of launch vehicles. There are several methods for system reliability analysis such as RBD, FTA, FMEA, Markov Chains, and etc. But for complex systems such as LV, they are not all efficiently applicable due to failure dependencies between compo...
Research on quality issues of business process models has recently begun to explore the process of creating process models. As a consequence, the question arises whether different ways of creating process models exist. In this vein, we observed 115 students engaged in the act of modeling, recording all their interactions with the modeling environment using a specialized tool. The recordings of ...
Opening-mode fractures in layered materials, such as sedimentary rocks, pavement, functionally graded composite materials or surface coating films, often are periodically distributed with spacings scaled to the thickness of the fractured layer. The current general explanation is that when the fracture spacing to layer thickness ratio changes from greater than to less than critical values the no...
In this paper, optimization of periodic inspection interval for a two-component system with failure dependency is presented. Failure of the first component is soft, namely, it does not cause the system stop, but it increases the system operating costs. The second component’s failure is hard, i.e. as soon as it occurs, the system stops operating. Any failure of the second component increases the...
Numerous models have been proposed in the last two decades for the deterioration of buried pipes. The most prominent approach has been the Markovian deterioration processes (MDP), which requires that the condition of the deteriorating system be encoded as an ordinal condition state. This encoding is based on numerous distress indicators obtained possibly from direct and indirect observations, a...
Traditional centralized business process management approaches pose difficulties in coping with rapid changes and evolving process models. We developed the Plural method to allow for decentralized modeling of processes. The Plural method enables process participants, rather than a centralized group of process engineers or managers, to model and maintain their processes. In previous works, we in...
Title of Document: AGENT AUTONOMY APPROACH TO PROBABILISTIC PHYSICS-OF-FAILURE MODELING OF COMPLEX DYNAMIC SYSTEMS WITH INTERACTING FAILURE MECHANISMS Katherine Emily Gromek, Doctor of Philosophy (Ph.D.) in Reliability Engineering 2015 Directed By: Professor Mohammad Modarres, Department of Mechanical Engineering A novel computational and inference framework of the physics-of-failure (PoF) reli...
The performance of a flexible manufacturing system (FMS) depends on the equipment efficiency and process control. In order to increase the equipment efficiency, the failure mode analysis and fault diagnosis can be used to reduce the frequency of unexpected breakdowns of machines. In addition, the statistical process control (SPC) can be used for adjusting the process parameters to eliminate pro...
The paper deals with the paradigm of factbased modelling and its relation to value-oriented business process modelling. Fact-based modelling is a conceptual approach for information systems modelling. It can be also considered as a synonym for object-role modelling (ORM). Value-oriented business process modelling represents resource-event-agent (REA) ontology and its REA value model. Analysing ...
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