SIL2 assessment of an Active/Standby COTS-based Safety-Related system

Giovanni Mazzeo, Luigi Coppolino, D’Antonio, Salvatore, Claudio Mazzariello and Luigi Romano

Reliability Engineering and System Safety, 2018, vol. 176, issue C, 125-134

Abstract: The need of reducing costs and shortening development time is resulting in a more and more pervasive use of Commercial-Off-The-Shelf components also for the development of Safety-Related systems, which traditionally relied on ad-hoc design. This technology trend exacerbates the inherent difficulty of satisfying – and certifying – the challenging safety requirements imposed by safety certification standards, since the complexity of individual components (and consequently of the overall system) has increased by orders of magnitude. To bridge this gap, this paper proposes an approach to safety certification that is rigorous while also practical. The approach is hybrid, meaning that it effectively combines analytical modeling and field measurements. The techniques are presented and the results validated with respect to an Active/Standby COTS-Based industrial system, namely the Train Management System of Hitachi-Ansaldo STS, which has to satisfy Safety Integrity Level 2 requirements. A modeling phase is first used to identify COTS safety bottlenecks. For these components, a mitigation strategy is proposed, and then validated in an experimental phase that is conducted on the real system. The study demonstrates that with a relatively little effort we are able to configure the target system in such a way that it achieves SIL2.

Keywords: Dependability; Reliability; Safety-Related; COTS; ICS; SIL (search for similar items in EconPapers)
Date: 2018
References: View complete reference list from CitEc
Citations:

Downloads: (external link)
http://www.sciencedirect.com/science/article/pii/S0951832017306804
Full text for ScienceDirect subscribers only

Related works:
This item may be available elsewhere in EconPapers: Search for items with the same title.

Export reference: BibTeX RIS (EndNote, ProCite, RefMan) HTML/Text

Persistent link: https://EconPapers.repec.org/RePEc:eee:reensy:v:176:y:2018:i:c:p:125-134

DOI: 10.1016/j.ress.2018.04.009

Access Statistics for this article

Reliability Engineering and System Safety is currently edited by Carlos Guedes Soares

More articles in Reliability Engineering and System Safety from Elsevier
Bibliographic data for series maintained by Catherine Liu ().