Int J Performability Eng ›› 2011, Vol. 7 ›› Issue (1): 61-76.doi: 10.23940/ijpe.11.1.p61.mag

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Functional Safety Analysis including Human Factors

KAZIMIERZ T. KOSMOWSKI   

  1. Gdansk University of Technology, G. Narutowicza 11/12, 80-233 Gdansk, Poland

Abstract:

In this paper selected aspects of human factors are discussed that should be taken into account during the design of safety-related functions for a complex hazardous installation and its protections. The layer of protection analysis (LOPA) methodology is used for simplified risk analysis based on defined accident scenarios. To control the risk the safety instrumented functions (SIFs) are identified and their safety integrity levels (SILs) determined based on results of risk assessment. Given SIF is to be realised by the electric/ electronic/ programmable electronic system (E/E/PES) or safety instrumented system (SIS) and the human-operator. The SIL is to be verified according to requirements and criteria given in international standards IEC 61508 and IEC 61511. Some issues concerning the alarm system (AS) designing with regard to human factors and related human reliability analysis (HRA) are outlined.
Received on November 18, 2009, revised on July 29, 2010
References: 30