While traditional design-time and off-line approaches to testing and verification contribute significantly to improving and ensuring high dependability of software, they may not cover all possible fault scenarios that a system could encounter at runtime. Thus, runtime ‘health management’ of complex embedded software systems is needed to improve their dependability. Our approach to Software Heal...

This research explores the use of the theory of recognition primed decision making and the technology of case-based reasoning to store fault management experience and make it available to operators confronting similar anomalous situations. Specifically, this project uses case-based reasoning technology to construct a knowledge base of actual fault management experience. This knowledge base is o...

In this paper, an approach for suitable fault management in traffic information networks, focusing on the isolation of network faults in infrastructure networks, will be introduced. We will show, that modelbased diagnosis is an efficient method for finding explanations consisting of the underlying fault events of system failures. A fault management system based on these concepts will be discuss...

OFMP is a hierarchical, network management protocol that enables group operations to be executed on the management information bases of all nodes in the group. As long as no faults occur, OFMP ensures that all nodes execute their local operation exactly once in each group operation. If \immediately-detectable" faults occur, it ensures masking fault-tolerance; i.e., all non-failed nodes execute ...

The purpose of this project is to extend and integrate existing results on fault diagnostics and fault management for passenger vehicles used in automated highway systems (AHS). These results have been combined to form a fault diagnostic and management system for the longitudinal and lateral control systems of the automated vehicles which has a hierarchical framework that complements the establ...

The backup of large data sets is preferably performed automatically outside of regular working hours. In highly structured computer networks, however, faults and exceptions may relatively frequently occur resulting in unsuccessful subprocesses. Therefore automated fault and configuration management is of interest. We report on a corresponding management system. Besides of monitoring and informa...

This project is a continuation of MOU 373. It concludes ongoing research to extend and integrate existing results on fault diagnostic and fault management research, and develop a comprehensive fault management system. Features include a multi-layer fault diagnostic and management system, diagnosis of faults in the sensors and actuators of the lateral and longitudinal control systems, detection ...

Many timing constraint (or real-time) distributed systems, such as real-time database systems, are now being used in safety critical applications. However, they are subject to system failures caused by the malfunction of underlying network components. Without the helps of network experts or sophisticated management tools, most users cannot resolve these network problems by themselves. Sometimes...

Like any software, web service fault management is also required to go through different phases of fault management lifecycle. Model based diagnosis has been a well established practice for its several positive aspects including cognitively being better understood by development and testing teams. Automata is a simple and formally well defined model being used for monitoring and diagnosis of sy...

Reasoning about causes and effects naturally arises in the engineering of safety-critical systems. A classical example is Fault Tree Analysis, a deductive technique used for system safety assessment, whereby an undesired state is reduced to the set of its immediate causes. The design of fault management systems also requires reasoning on causality relationships. In particular, a fail-operationa...