Classification of strategies for aggregating sub-system risk information to system risk assessments in a societal safety context
(2020) 30th European Safety and Reliability Conference, ESREL 2020 and 15th Probabilistic Safety Assessment and Management Conference, PSAM15 2020 p.4224-4231- Abstract
Risk assessments are often performed at multiple system levels in order to inform decision-making; for example, on multiple levels within an organization or on multiple societal levels. One way to conduct risk assessments on the higher system levels is to utilize and aggregate risk information from the lower level assessments. However, the process of aggregating risk information can be highly complex and there are several strategies for aggregating risk information depending on the underlying risk information and the aims of the analyst. A particular strategy can only be used if certain conditions are met and there are many challenges related to using different types of aggregation strategies. Little research has focused on describing... (More)
Risk assessments are often performed at multiple system levels in order to inform decision-making; for example, on multiple levels within an organization or on multiple societal levels. One way to conduct risk assessments on the higher system levels is to utilize and aggregate risk information from the lower level assessments. However, the process of aggregating risk information can be highly complex and there are several strategies for aggregating risk information depending on the underlying risk information and the aims of the analyst. A particular strategy can only be used if certain conditions are met and there are many challenges related to using different types of aggregation strategies. Little research has focused on describing and systematizing different aggregation strategies. The aim of this paper is therefore propose a number of aggregation strategies, to illustrate these and to describe challenges in employing them. The aggregation strategies are labelled as either nominal, likelihood aggregation or consequence aggregation; and these are further separated into simple and complex versions. It is argued that the aggregation framework can be used to add clarity to the process of aggregating risk information.
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- author
- Hassel, Henrik LU
- organization
- publishing date
- 2020
- type
- Chapter in Book/Report/Conference proceeding
- publication status
- published
- subject
- keywords
- Aggregation strategies, Risk aggregation, Risk and Vulnerability Assessment, Societal safety
- host publication
- Proceedings of the 30th European Safety and Reliability Conference and the 15th Probabilistic Safety Assessment and Management Conference
- editor
- Baraldi, Piero ; Di Maio, Francesco and Zio, Enrico
- pages
- 8 pages
- publisher
- Research Publishing, Singapore
- conference name
- 30th European Safety and Reliability Conference, ESREL 2020 and 15th Probabilistic Safety Assessment and Management Conference, PSAM15 2020
- conference location
- Venice, Italy
- conference dates
- 2020-11-01 - 2020-11-05
- external identifiers
-
- scopus:85110394430
- scopus:85107301240
- ISBN
- 9789811485930
- DOI
- 10.3850/978-981-14-8593-0_4546-cd
- language
- English
- LU publication?
- yes
- id
- 4398b7f6-446d-4dc7-80c4-0a507456fee2
- date added to LUP
- 2021-06-24 15:11:24
- date last changed
- 2025-04-04 14:11:48
@inproceedings{4398b7f6-446d-4dc7-80c4-0a507456fee2,
abstract = {{<p>Risk assessments are often performed at multiple system levels in order to inform decision-making; for example, on multiple levels within an organization or on multiple societal levels. One way to conduct risk assessments on the higher system levels is to utilize and aggregate risk information from the lower level assessments. However, the process of aggregating risk information can be highly complex and there are several strategies for aggregating risk information depending on the underlying risk information and the aims of the analyst. A particular strategy can only be used if certain conditions are met and there are many challenges related to using different types of aggregation strategies. Little research has focused on describing and systematizing different aggregation strategies. The aim of this paper is therefore propose a number of aggregation strategies, to illustrate these and to describe challenges in employing them. The aggregation strategies are labelled as either nominal, likelihood aggregation or consequence aggregation; and these are further separated into simple and complex versions. It is argued that the aggregation framework can be used to add clarity to the process of aggregating risk information.</p>}},
author = {{Hassel, Henrik}},
booktitle = {{Proceedings of the 30th European Safety and Reliability Conference and the 15th Probabilistic Safety Assessment and Management Conference}},
editor = {{Baraldi, Piero and Di Maio, Francesco and Zio, Enrico}},
isbn = {{9789811485930}},
keywords = {{Aggregation strategies; Risk aggregation; Risk and Vulnerability Assessment; Societal safety}},
language = {{eng}},
pages = {{4224--4231}},
publisher = {{Research Publishing, Singapore}},
title = {{Classification of strategies for aggregating sub-system risk information to system risk assessments in a societal safety context}},
url = {{http://dx.doi.org/10.3850/978-981-14-8593-0_4546-cd}},
doi = {{10.3850/978-981-14-8593-0_4546-cd}},
year = {{2020}},
}