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| When | Who | What |
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20.01.2017 | Cancelled | No meeting this week. |
| 27.01.2017 | Prof. Anne Barros | Title: Modelling degradations, condition based maintenance and imperfect tests for Safety Instrumented System Classical analytical models developed to quantify the availability of Safety Instrumented Systems (SIS) are currently based on the assumption of exponential lifetime distributions for all the units they are made of (1). The aim of the present work is to show how some stochastic modeling framework based on renewal processes, virtual age and multiphase Markov processes can be used to generalize existing analytical tools. The main goal is to include other lifetime laws than the exponential one (e.g. Weibull law or lifetime based on discrete state degradation process) and to model the possible effects of tests and condition-based maintenance. The presentation this Friday will focus on a preliminary discussion about Weibull law versus Exponential law. (1) M. Rausand, Reliability of Safety Critical Systems, Wiley, Hoboken, NJ. 2014 |
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