Failure Mode and Effect Analysis (FMEA) is a widely used quality improvement and risk assessment tool in manufacturing. Design and process failures recorded through FMEA provides valuable knowledge for future product and process design. However, the way the knowledge is captured poses considerable difficulties for reuse. This research aims to contribute to the reuse of FMEA knowledge through a ...

Um die oft hohen Sicherheitsanforderungen eingebetteter Systeme (im Sinne von Safety) zu gewährleisten, werden bei ihrer Entwicklung sowohl dynamische Testverfahren als auch statische Sicherheitsanalysen eingesetzt. Für den Test bieten sich insbesondere risikobasierte Ansätze an, da sie sicherstellen, dass solche Teile bzw. Anforderungen des Testobjektes früher und intensiver getestet werden, d...

Industrial plants are subjected to very dangerous events. Therefore, it is very essential to carry out an efficient risk and safety analysis. In classical applications, risk analysis treats event probabilities as certain data, while there is much penurious knowledge and uncertainty in generic failure data that will lead to biased and inconsistent alternative estimates. Then, in order to achieve...

The paper is concerned with the study of criticality analysis of components of Gas Turbine Power Plant Systems (GTPPS) and the failures occurring in the plant. Failure mode and effect and criticality analysis (FMECA) is carried out to estimate the criticality number for different components and failure modes. In addition the failure effects, higher effects and end effects are incorporated in th...

We study the quality of service (QoS) of failure detectors. By QoS, we mean a specification that quantifies (a) how fast the failure detector detects actual failures, and (b) how well it avoids false detections. We first propose a set of QoS metrics to specify failure detectors for systems with probabilistic behaviors, i.e., for systems where message delays and message losses follow some probab...

Remotely sensed nighttime lights (NTL) datasets derived from the Defense Meteorological Satellite Program’s Operational Linescan System (DMSP/OLS) have been identified as a good indicator of the urbanization process and have been widely used to study such demographic and economic variables as population distribution and density, electricity consumption, and carbon emission. However, one issue m...

Energy efficiency policies are pursued as a way to provide affordable and sustainable energy services. Efficiency measures that reduce energy service costs will free up resources that can be spent in the form of increased consumption—either of that same good or service or of other goods and services that require energy (and that have associated emissions). This is called the rebound effect. The...

The transportation system has a number of adverse environmental impacts. The effects can be direct, indirect and both. Indirect effects may have greater consequences than direct effects, but are not generally well known. Transportation system and the operation of vehicles can affect rural and urban community. Emission and road crashes have a significant impact on health, and the form of the tra...

One of possible ways to achieve a very high level of confidence in a system is to develop its adequate model and then to analyse the properties of this model. The paper presents how object oriented modelling extended with formal specifications is used to support FMEA of software intensive systems. The paper refers to the case study of a computerised railway signalling system.

Project management has been consolidated into organizations due to its high added value, allowing that project results are delivered on time, budget, scope and quality. This is specially important for ICT projects, for which innovation is usually present. For such, the correct resource allocation, and effective management require application of project management techniques and tools. In this s...