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A Consistency Check Algorithm for Component-Based Refinements of Fault Trees

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3 Author(s)
Domis, D. ; Software Eng. Dependability Group, Univ. of Kaiserslautern, Kaiserslautern, Germany ; Höfig, K. ; Trapp, M.

The number of embedded systems in our daily lives that are distributed, hidden, and ubiquitous continues to increase. Many of them are safety-critical. To provide additional or better functionalities, they are becoming more and more complex, which makes it difficult to guarantee safety. It is undisputed that safety must be considered before the start of development, continue until decommissioning, and is particularly important during the design of the system and software architecture. An architecture must be able to avoid, detect, or mitigate all dangerous failures to a sufficient degree. For this purpose, the architectural design must be guided and verified by safety analyses. However, state-of-the-art component-oriented or model-based architectural design approaches use different levels of abstraction to handle complexity. So, safety analyses must also be applied on different levels of abstraction, and it must be checked and guaranteed that they are consistent with each other, which is not supported by standard safety analyses. In this paper, we present a consistency check for CFTs that automatically detects commonalities and inconsistencies between fault trees of different levels of abstraction. This facilitates the application of safety analyses in top-down architectural designs and reduces effort.

Published in:

Software Reliability Engineering (ISSRE), 2010 IEEE 21st International Symposium on

Date of Conference:

1-4 Nov. 2010

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