The Use of Safety Cases in Certification and Regulation

Certification of safety-critical systems is usually based on evaluation of whether a system or product reduces risk of specific losses to an acceptable level. There are major differences, however, in how that decision is made and on what evidence is required. The term Safety Case has become popular...

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Main Author: Leveson, Nancy G.
Format: Working Paper
Language:en_US
Published: Massachusetts Institute of Technology. Engineering Systems Division 2016
Online Access:http://hdl.handle.net/1721.1/102833
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author Leveson, Nancy G.
author_facet Leveson, Nancy G.
author_sort Leveson, Nancy G.
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description Certification of safety-critical systems is usually based on evaluation of whether a system or product reduces risk of specific losses to an acceptable level. There are major differences, however, in how that decision is made and on what evidence is required. The term Safety Case has become popular recently as a solution to the problem of regulating safety-critical systems. The term arises from the HSE (Health and Safety Executive) in the U.K., but different definitions seem to be rife. To avoid confusion, this paper uses the term “assurance cases” for the general term and limits the use of the term “safety case” to a very specific definition as an argument for why the system is safe. This paper examines the use of safety cases and regulation in general. The first important distinction is between types of regulation.
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spelling mit-1721.1/1028332019-04-12T16:23:42Z The Use of Safety Cases in Certification and Regulation Leveson, Nancy G. Certification of safety-critical systems is usually based on evaluation of whether a system or product reduces risk of specific losses to an acceptable level. There are major differences, however, in how that decision is made and on what evidence is required. The term Safety Case has become popular recently as a solution to the problem of regulating safety-critical systems. The term arises from the HSE (Health and Safety Executive) in the U.K., but different definitions seem to be rife. To avoid confusion, this paper uses the term “assurance cases” for the general term and limits the use of the term “safety case” to a very specific definition as an argument for why the system is safe. This paper examines the use of safety cases and regulation in general. The first important distinction is between types of regulation. 2016-06-02T14:53:36Z 2016-06-02T14:53:36Z 2011-11 Working Paper http://hdl.handle.net/1721.1/102833 en_US ESD Working Papers;ESD-WP-2011-13 application/pdf Massachusetts Institute of Technology. Engineering Systems Division
spellingShingle Leveson, Nancy G.
The Use of Safety Cases in Certification and Regulation
title The Use of Safety Cases in Certification and Regulation
title_full The Use of Safety Cases in Certification and Regulation
title_fullStr The Use of Safety Cases in Certification and Regulation
title_full_unstemmed The Use of Safety Cases in Certification and Regulation
title_short The Use of Safety Cases in Certification and Regulation
title_sort use of safety cases in certification and regulation
url http://hdl.handle.net/1721.1/102833
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