An Object-Based Approach to Modelling and Analysis of Failure Properties

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  2. Dr Rogerio De Lemos
  3. Dr Stephen Riddle
  4. Dr Amer Saeed
Author(s)Cepin M, de Lemos R, Mavko B, Riddle S, Saeed A
Publication type Report
Series TitleDepartment of Computing Science Technical Report Series
Source Publication Date1997
Report Number598
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In protection systems, when traditional technology is replaced by software, the functionality and complexity of the system is likely to increase. The quantitative evidence normally provided for safety certification of traditional systems cannot be relied upon in software-based systems. Instead there is a need to provide qualitative evidence. As a basis for the required qualitative evidence, we propose an object-based approach that allows modelling of both the application and software domains. From the object class model of a system and a formal specification of the failure properties of its components, we generate a graph of failure propagation over object classes, which is then used to generate a graph in terms of object instances in order to conduct fault tree analysis. The model is validated by comparing the resulting minimal cut sets with those obtained from the fault tree analysis of the original system. The approach is illustrated on a case study based on a protection system from the Nuclear Industry.
InstitutionDepartment of Computing Science, University of Newcastle upon Tyne
Place PublishedNewcastle upon Tyne
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