Dear ALLSTAT
I enclose a final reminder of the details of a RSS meeting organised by BIS in Loughborough.
The meeting will be held tomorrow on Wednesday 28 May at 4-6pm NOT AT THE TIME ADVERTISED IN RSS NEWS!!!!!!!!!!!!
The meeting will take place in Room S173 in the S Building - the Institute of Polymer Technology and Materials Engineering at Loughborough University. Directions can be found at:
http://www.lboro.ac.uk/about/map/pages/finding-lborouni.html
First talk.
Success States in System Failure Analysis
John Andrews and Rasa Remenyte-Prescott, Loughborough University
Abstract
Many conventional system reliability techniques are concerned with the effect that component level failure events have on the system performance. It is possible to consider both the failed and functioning component states when determining the causes of system failure but this is rarely done as it significantly increases the complexity of the analysis and has to be justified by the objectives of the study. When components functioning contribute to the system failure then the system is known as non-coherent.
This talk seeks to give some view on whether component functioning states need to be considered when conducting a system reliability assessment or if a non-coherent analysis is an unnecessary mathematical complexity.
For coherent systems the Binary Decision Diagram (BDD) can be used to yield a very efficient analysis. An extension of this concept to the Ternary Decision Diagram (TDD) is described for the analysis of non-coherent systems.
Second talk.
Modelling the Performance of UK Maritime Coastguard Search And Rescue Coordination Centres John Quigley Department of Management Science University of Strathclyde Glasgow UK
Abstract
The UK Maritime Coastguard Agency operates 19 Search And Rescue (SAR) coordination centres about the UK. These centres do not themselves undertake rescues. Instead, resources are strategically positioned to meet specified response times; the personnel using the equipment (lifeboats and coast rescue teams) tend to be local volunteers. There are currently nearly 400 Coastguard Rescue Teams (CRTs), 200 lifeboats and helicopters around the UK. However, the coordination staff has the vital role of receiving alerts, communicating with the casualty, assessing the scale of the distress, selecting the appropriate SAR response, and activating and coordinating that response by alerting the relevant personnel and directing them to the casualty.
We will present the findings of an empirical study of the performance of these centres over the past 12 years the outcome of which was a model that predicts the number of lives lost each year within each centre and the identification of factors that affect this outcome.
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