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Safety instrumented functions (SIFs) of process technology engineering (PCE) in the process industry are subject to regulations stated by international standards such as IEC 61508 and 61511. To be compliant with these standards a safety integrity level (SIL) assessment has to be carried out. The main goals are numerical measures for the amount of reliability that the SIF offers. One of these is the...
Markov models are essential for modeling systems in safety and reliability calculations. Unfortunately, these models become exponentially more complex with an increasing number of components. This makes manual modeling time-consuming, complicated, and prone to error. This paper introduces a method to systematically and automatically generate Markov models. The system model is made up of components...
Condition based maintenance plus (CBM+) can be described as optimal condition based maintenance (CBM) procedures defined by applying the principles and process of reliability centered maintenance. This approach offers a rigorous and disciplined method, based on the system FMECA, to determine the least cost maintenance policy and procedures that are consistent with acceptable levels of safety and readiness,...
Software and system dependability is getting ever more important in embedded system design. Current industrial practice of model-based analysis is supported by state-transition diagrammatic notations such as Statecharts. State-of-the-art modelling tools like STATEMATE support safety and failure-effect analysis at design time, but restricted to qualitative properties. This paper reports on a (plug-in)...
In the early and mid-stage of a pipeline in using, the gas pipeline detection-cycle (or detection of life) when the gas-pipeline still in a lower level of risk can use a relatively fixed cycle for pipeline detection, but when the pipeline puts into use up to a certain age, especially in the late use of the pipeline, the probability of the occurrences of pipeline accidents is in a trend of gradually...
We develop an inspection and maintenance policy to minimize the cost of maintaining a given section of road or highway when there is a great deal of uncertainty in the degradation process. We propose to model the degradation of a section of road based on the proliferation and growth of cracks. We utilize a combination of a Poisson and gamma process to account for the tremendous amount of uncertainty...
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