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Full-Text Articles in Operations Research, Systems Engineering and Industrial Engineering
Statistical Monitoring Of Queuing Networks, Yaren Bilge Kaya
Statistical Monitoring Of Queuing Networks, Yaren Bilge Kaya
USF Tampa Graduate Theses and Dissertations
Queuing systems are important parts of our daily lives and to keep their operations at an efficient level they need to be monitored by using queuing Performance Metrics, such as average queue lengths and average waiting times. On the other hand queue lengths and waiting times are generally random variables and their distributions depend on different properties like arrival rates, service times, number of servers. We focused on detecting the change in service rates in this report. Therefore, we monitored queues by using Cumulative Sum(CUSUM) charts based on likelihood ratios and compared the Average Run Length values of different service …
Physical And Social Systems Resilience Assessment And Optimization, Daniel Romero Rodriguez
Physical And Social Systems Resilience Assessment And Optimization, Daniel Romero Rodriguez
USF Tampa Graduate Theses and Dissertations
Resilience has been measured using qualitative and quantitative metrics in engineering,economics, psychology, business, ecology, among others. This dissertation proposes a resilience metric that explicitly incorporates the intensity of the disruptive event to provide a more accurate estimation of system resilience. A comparative analysis between the proposed metric and average performance resilience metrics for linear and nonlinear loss and recovery functions suggests that the new metric enables a more objective assessment of resilience for disruptions with different intensities. Moreover, the proposed metric is independent of a control time parameter. This provides a more consistent resilience estimation for a given system and …