Controlled systems, failure prediction and maintenance

Failure prediction for monitored systems

We consider a monitored system with observation Y (t) at time t modeled by a stochastic process, and where system failure is connected to the exceedance of some threshold for this process. Typically, the threshold is not exceeded under normal conditions, where the process Y (t) is supposed to show some kind of stationarity. However, due to unexpected events the process may leave the stationary ...

Design of Reconfigurable Semiconductor Manufacturing Systems with Maintenance and Failure

Due to expensive, highly complex and timeconsuming processes, semiconductormanufacturing systems have been given a special attention. In our previous work [5], a heuristic algorithm to design the reconfigurably automated production system was proposed. However, machine breakdowns and planned and unplanned maintenance were not considered. This paper extends that work and addresses the related de...

Online Failure Prediction of Dynamically Evolving Systems

When dealing with dynamically evolving systems, components may be inserted or removed while the system is being operated. Unsafe run-time changes may compromise the correct execution of the entire system, and online analysis techniques have been proposed to mitigate the effects of such failures. With CASSANDRA we want to move one step ahead, by defining a novel proactive monitoring and verifica...

Advanced Failure Prediction in Complex Software Systems

The availability of software systems can be increased by preventive measures which are triggered by failure prediction mechanisms. In this paper we present and evaluate two non-parametric techniques which model and predict the occurrence of failures as a function of discrete and continuous measurements of system variables. We employ two modelling approaches: an extended Markov chain model and a...

Internet Supportive Systems and Rehabilitation of Addicts Under Maintenance Treatment