An open modelling approach for availability and reliability of systems

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    This paper introduces an Open Modelling approach for Availability and Reliability of Systems (OpenMARS), which is developed for risk and performance assessment of large and complex systems with dynamic behaviours. The approach allows for combining the most common risk assessment and operation modelling techniques. This ensures a high degree of freedom for the modeller to accurately describe the system without limitations imposed by an individual technique. OpenMARS uses a platform-independent tabular format to define the used modelling technique, to create the model structure, and to assign the parameter values. We developed the format to enable a straightforward manual model definition while maintaining database compatibility. This paper also presents our calculation engine for stochastic simulation-based analysis of OpenMARS models. Our intention is to use this approach as a basis for new software. We demonstrate the feasibility of OpenMARS with an example of a multi-state production process that is subject to failures. The example creates a comprehensive system model by combining interconnected failure logic, operation phase, and production function models. We believe that the advanced features of OpenMARS have wide ranging applications for analysis of reliability, performance, and energy efficiency of complex industrial processes.
    Original languageEnglish
    Pages (from-to)387-399
    Number of pages13
    JournalReliability Engineering and System Safety
    Early online dateNov 2018
    Publication statusPublished - Mar 2019
    Publication typeA1 Journal article-refereed


    • Risk assessment technique
    • System performance
    • Complex systems
    • Dynamic modelling
    • Fault tree analysis
    • Model data format

    Publication forum classification

    • Publication forum level 2


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