A generic method for a bottom-Up ASIL decomposition

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Abstract

Automotive Safety Integrity Level (ASIL) decomposition is a technique presented in the ISO 26262: Road Vehicles - Functional Safety standard. Its purpose is to satisfy safety-critical requirements by decomposing them into less critical ones. This procedure requires a system-level validation, and the elements of the architecture to which the decomposed requirements are allocated must be analyzed in terms of Common-Cause Faults (CCF). In this work, we present a generic method for a bottom-up ASIL decomposition, which can be used during the development of a new product. The system architecture is described in a three-layer model, from which fault trees are generated, formed by the application, resource, and physical layers and their mappings. A CCF analysis is performed on the fault trees to verify the absence of possible common faults between the redundant elements and to validate the ASIL decomposition.

Original languageEnglish
Title of host publicationComputer Safety, Reliability, and Security - 37th International Conference, SAFECOMP 2018, Proceedings
EditorsAmund Skavhaug, Friedemann Bitsch, Barbara Gallina
Place of PublicationCham
PublisherSpringer
Pages12-26
Number of pages15
ISBN (Electronic)978-3-319-99130-6
ISBN (Print)978-3-319-99129-0
DOIs
Publication statusPublished - 1 Jan 2018
Event37th International Conference on Computer Safety, Reliability and Security, SAFECOMP 2018 - Vasteras, Sweden
Duration: 18 Sep 201821 Sep 2018

Publication series

NameLecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics)
Volume11093 LNCS
ISSN (Print)0302-9743
ISSN (Electronic)1611-3349

Conference

Conference37th International Conference on Computer Safety, Reliability and Security, SAFECOMP 2018
CountrySweden
CityVasteras
Period18/09/1821/09/18

Keywords

  • ADAS
  • ASIL decomposition
  • Automotive architecture
  • Common-Cause fault analysis
  • Fault trees
  • Functional safety
  • ISO 26262

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  • Cite this

    Frigerio, A., Vermeulen, B., & Goossens, K. (2018). A generic method for a bottom-Up ASIL decomposition. In A. Skavhaug, F. Bitsch, & B. Gallina (Eds.), Computer Safety, Reliability, and Security - 37th International Conference, SAFECOMP 2018, Proceedings (pp. 12-26). (Lecture Notes in Computer Science (including subseries Lecture Notes in Artificial Intelligence and Lecture Notes in Bioinformatics); Vol. 11093 LNCS). Springer. https://doi.org/10.1007/978-3-319-99130-6_2