Results 221 to 230 of about 251,357 (265)

Extending Contract theory with Safety Integrity Levels

2015 IEEE 16th International Symposium on High Assurance Systems Engineering, 2015
In functional safety standards such as ISO 26262 and IEC 61508, Safety Integrity Levels (SILs) are assigned to top-level safety requirements on a system. The SILs are then either inherited or decomposed down to safety requirements on sub-systems, such that if the sub-systems are sufficiently reliable in fulfilling their respective safety requirements ...
Jonas Westman, Mattias Nyberg
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A calculation method for software safety integrity level

Proceedings of the 1st Workshop on Critical Automotive applications Robustness & Safety - CARS '10, 2010
In the functional safety standards (IEC 61508 and ISO/DIS 26262), development methods and quantitative analytical methods are defined for establishment of safety-related systems. However, only development methods are recommended to establish the software of safety-related systems.
Takaji Fujiwara, Juan Manuel Estevez, Yoshinobu Satoh, Shigeru Yamada   +3 more
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Safety Integrity Level in Valves

Journal of Failure Analysis and Prevention, 2019
Safety integrity level (SIL) is a part of an international standard such as IEC 61508 that provides suppliers and end users with a common framework to design products and systems for safety-related applications. SIL provides a scientific and numeric approach to specifying and designing safety systems, enabling risk of failure to be quantified.
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Apportioning Safety Integrity Levels

Safety and Reliability, 2002
AbstractThe method used to determine Safety Integrity Levels (SILs) for elements of a system should ensure that the risks associated with that element are reduced to acceptable levels and that they are shown to be so. However, to accurately determine the risk associated with part of a system requires detailed analysis of the design, after which it may ...
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A systematic approach to software safety integrity levels

1997
International Standards for safety-critical software typically use notions of Safety Integrity Levels (SILs) which in our experience are difficult to apply and which lack credible assessment criteria. This paper proposes risk modelling as a basis for allocation of SILs to software and illustrates its use.
Peter A. Lindsay, John A. McDermid
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Functional Safety (Safety Integrity Levels)

2014
During the 1990s the concept of Safety Integrity Levels (SIL) was developed [1]. It serves to assess safety-related systems and concerns all components and sub-systems required to realize safety functions from the sensor to the final element. Apart from that it applies to application software, which was developed for systems with limited variability ...
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Automatic and optimal allocation of safety integrity levels

2012 Proceedings Annual Reliability and Maintainability Symposium, 2012
Powertrain electrification of vehicles leads to a higher number of sensors, actuators and control functions resulting in increasing complexity. Due to the safety-criticality of the functionalities, safety standards must be considered during system development.
Roland Mader, Eric Armengaud, Andrea Leitner, Christian Steger   +3 more
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Evaluation of uncertainty in safety integrity level calculations

Process Safety Progress, 2016
The evaluation of the safety integrity level (SIL) of a new or existing safety instrumented system (SIS) requires detailed calculations based on the failure rates of the device and the planned maintenance‐testing cycle for the system. The failure rates of the devices are taken from standard failure rate tabulations of equipment.
Raymond “Randy” Freeman, Angela Summers   +1 more
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Safety Integrity Levels: An Industrial Viewpoint

1999
Safety integrity levels (SILs) are now an integral part of safety engineering and appear in almost all modern safety standards. This paper begins with various intuitive interpretations of what SILs mean and how they are calculated. It then considers the engineering basis behind the setting of SILs, paying particular attention to the requirements of the
Vivien Hamilton, Ceri Rees
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THE IMPACT OF SOCIAL FACTORS ON ACCEPTABLE LEVELS OF SAFETY INTEGRITY

IFAC Proceedings Volumes, 1990
Abstract The paper emphasises the inherently subjective nature of the concept of safety, whilst accepting the need for some objectively based means of measuring it. The concept of levels of safety is introduced. The combination of risk and consequence as a means of determining required safety integrity as described in IEC 65A(Secretariate)-94I is ...
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