Hazard and Operability (HazOp) and Fault Tree Analyses (FTA) are embedded into UML component models. The latter are constructed by employing UML's extension mechanisms in conjunction with component-based software techniques. Taking an application's safety-related requirements into consideration, the elements of HazOp and FTA are defined as component attributes, and assigned to a UML component m...

Agroparks offer in theory a variety of economic advantages and environmental benefits. Since agropark projects are typically capital intensive and with high societal impact, appraisal from lenders and policy makers will play a key role in the realisation of the concept. In practice, however, project appraisal is hampered by the complexity of the concept and the multitude of risks. In this paper...

In this paper a model for dynamic fault tree (FT) analysis is developed. The model is ussed for the analysis of a cold standby redundant system. It is shown that a typical modern fault tree analysis (FTA), resulting in the Boolean domain in a short pseudopolynomial, i.e., a polynomial in the literals of the FT input variables, can yield grave errors in case of cold standby, even though the sing...

Fault tree analysis (FTA) has been modified in different ways to make it capable of performing quantitative and qualitative safety analysis with temporal gates, thereby overcoming its limitation in capturing sequential failure behaviour. However, for many systems, it is often very difficult to have exact failure rates of components due to increased complexity of systems, scarcity of necessary s...

By using the theory of artificial intelligence fault diagnosis of hydraulic excavator of several basic problems are discussed in this paper, the artificial intelligence neural network model is established for the fault diagnosis of hydraulic system; the combined application of fault diagnosis analysis (FTA) and artificial neural network is evaluated. In view of the hydraulic excavator failure s...

Several requirements analysis techniques widely used in safety-critical systems are being adapted to support the analysis of secure systems. Perhaps the most relevant system safety technique for Intrusion Detection Systems is hazard analysis. Hazard analysis identi es and analyzes hazards (states that can lead to an accident) in terms of their severity of e ects and likelihood of occurrence. As...

Fault tree analysis (FTA), as one of the powerful tools in reliability engineering, has been widely used to enhance system quality attributes. In most fault tree analyses, precise values are adopted to represent the probabilities of occurrence of those events. Due to the lack of sufficient data or imprecision of existing data at the early stage of product design, it is often difficult to accura...

Fault tree analysis (FTA) is one of the important methods safety system engineering commonly utilized in various industries to evaluate and improve reliability complex systems. To grasp current situation development trend FTA research further point out FTA’s future directions, 1469 FTA-related articles from literature were retrieved SCIE SSCI databases. Informetric methods, including co-authors...