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

Lookup NU author(s): Dr Rogerio De Lemos, Dr Stephen RiddleORCiD, Dr Amer Saeed



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.

Publication metadata

Author(s): Cepin M, de Lemos R, Mavko B, Riddle S, Saeed A

Publication type: Report

Publication status: Published

Series Title: Department of Computing Science Technical Report Series

Year: 1997

Pages: 12

Print publication date: 01/01/1997

Source Publication Date: 1997

Report Number: 598

Institution: Department of Computing Science, University of Newcastle upon Tyne

Place Published: Newcastle upon Tyne