A Devil’s Advocate on SIL 4

  • Odd Nordland
Conference paper

Abstract

The concept of safety integrity levels is well established and for many safety critical systems SIL 4 is demanded by default. The problem with SIL 4 is that it is impossible to prove and the demand is often not justified. A devil’s advocate view is adopted and a number of questions related to demanding SIL 4 are asked and the problems to be addressed when answering them are discussed

Keywords

Smoke 

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References

  1. CENELEC (2003) Railway applications - Communication, signalling and processing systems Safety related electronic systems for signalling. EN 50129. CENELEC, Brussels, BelgiumGoogle Scholar
  2. IEC (1998) Functional safety of electrical/electronic/programmable electronic safety-related systems. IEC 61508. International Electrotechnical Commission, Geneva, SwitzerlandGoogle Scholar

Copyright information

© Springer-Verlag London Limited 2012

Authors and Affiliations

  • Odd Nordland
    • 1
  1. 1.SINTEF ICTTrondheimNorway

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