Failure rate evaluation method for HW architecture derived from functional safety standards (ISO 19014, ISO 25119, IEC 61508)

2017 ◽  
Vol 165 ◽  
pp. 124-133 ◽  
Author(s):  
Francesco De Rosa ◽  
Raffaello Cesoni ◽  
Stefano Genta ◽  
Paolo Maggiore
Keyword(s):  
Failure Rate ◽  
Evaluation Method ◽  
Functional Safety ◽  
Safety Standards ◽  
Iec 61508 ◽  
Rate Evaluation

scholarly journals Effect Of Selected Factors On The Safety Integrity Level (SIL)

2015 ◽  
Vol 35 (1) ◽  
pp. 85-98
Author(s):  
Młynarski Stanisław ◽  
Pilch Robert ◽  
Kaczor Grzegorz ◽  
Smolnik Maksymilian ◽  
Szkoda Maciej ◽  
...  
Keyword(s):  
Failure Rate ◽  
Safety Assessment ◽  
Repair Time ◽  
Functional Safety ◽  
Safety Level ◽  
Reliability Indicators ◽  
Safety Integrity Level ◽  
Iec 61508 ◽  
Technical Systems ◽  
The Impact

Abstract The presented paper concerns the functional safety problems of technical systems. The characteristics of safety assessment, described in IEC 61508 standard are an introduction to the problems associated with the methodology of the calculation of Safety Integrity Levels (SIL). The parameters obtained from reliability indicators, were calculated for the purpose of assessing the impact of repair time for the elements of a given system on the SIL. The calculated values of failure rate and the probability of dangerous failure show the sensitivity of the system at different time to repair values for various reliability-wise configurations. The indicators characterizing the safety level, calculated of the system with no repair time are the basis for demonstrating the influence of repair on the safety integrity level.

scholarly journals The Importance of Interoperability in Functional Safety Standards

Computer ◽  
2021 ◽  
Vol 54 (3) ◽  
pp. 80-84
Author(s):  
Riccardo Mariani ◽  
Nir Maor ◽  
Jyotika Athavale ◽  
Kevin Gay
Keyword(s):  
Functional Safety ◽  
Safety Standards

Mathematical Approaches in Functional Safety Assessment for E/E/PE Safety-Related Software

2021 ◽  
pp. 2150043
Author(s):  
Shinji Inoue ◽  
Takaji Fujiwara ◽  
Shigeru Yamada
Keyword(s):  
Software Reliability ◽  
Safety Assessment ◽  
Assessment Method ◽  
Functional Safety ◽  
Reliability Modeling ◽  
Software Failure ◽  
Safety Integrity Level ◽  
Iec 61508 ◽  
Systematic Failure ◽  
Quantitative Safety Assessment

Safety integrity level (SIL)-based functional safety assessment is widely required in designing safety functions and checking their validity of electrical/electronic/programmable electronic (E/E/PE) safety-related systems after being issued IEC 61508 in 2010. For the hardware of E/E/PE safety-related systems, quantitative functional safety assessment based on target failure measures is needed for deciding or allocating the level of SIL. On the other hand, IEC 61508 does not provide any quantitative safety assessment method for allocating SIL for the software of E/E/PE safety-related systems because the software failure is treated as a systematic failure in IEC 61508. We discuss the needfulness of quantitative safety assessment for software of E/E/PE safety-related systems and propose mathematical fundamentals for conducting quantitative SIL-based safety assessment for the software of E/E/PE safety-related systems by applying the notion of software reliability modeling and assessment technologies. We show numerical examples for explaining how to use our approaches.

Sign in / Sign up

Export Citation Format

Share Document