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Safe Comp 95 pp 353-371 | Cite as

Requirements Analysis and Safety: A Case Study (using GRASP)

  • A. Coombes
  • J. McDermid
  • J. Moffett
  • P. Morris
Conference paper

Abstract

Modifications to requirements take place under many circumstances. In the case of safety critical systems, the most tragic is following an accident. Although this may ensure that the particular accident will be avoided by the modified system in the future, there is no guarantee that systems often involves compromises between different failure modes.

GRASP (Goal based Requirements Analysis Specification and Proof) is an evolving goal-driven requirements specification method, incorporating a causal modelling language, intended for the development of requirements for safety critical systems. In this paper, we show how GRASP can be used to model an accident and use it to shed light on the causes of that accident. We then demonstrate the use of GRASP in redefining the requirements to prevent future occurrences of this accident, while remaining mindful of the need to meet previously established safety requirements.

Keywords

Landing Gear Goal Structure Safety Critical System Safety Case Unsafe Behaviour 
These keywords were added by machine and not by the authors. This process is experimental and the keywords may be updated as the learning algorithm improves.

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Copyright information

© Springer-Verlag London 1995

Authors and Affiliations

  • A. Coombes
    • 1
  • J. McDermid
    • 1
  • J. Moffett
    • 1
  • P. Morris
    • 2
  1. 1.High Integrity Systems Engineering Group and BAe Dependable Computing Systems Centre, Department of Computer ScienceUniversity of YorkUnited Kingdom
  2. 2.Institute for Systems Engineering and InformaticsCommission of the European Communities Joint Research CentreIspra (VA)Italy

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