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Deriving safety cases for hierarchical structure in model-based development

Deriving safety cases for hierarchical structure in model-based development
Deriving safety cases for hierarchical structure in model-based development
Model-based development and automated code generation are increasingly used for actual production code, in particular in mathematical and engineering domains. However, since code generators are typically not qualified, there is no guarantee that their output satisfies the system requirements, or is even safe. Here we present an approach to systematically derive safety cases that argue along the hierarchical structure in model-based development. The safety cases are constructed mechanically using a formal analysis, based on automated theorem proving, of the automatically generated code. The analysis recovers the model structure and component hierarchy from the code, providing independent assurance of both code and model. It identifies how the given system safety requirements are broken down into component requirements, and where they are ultimately established, thus establishing a hierarchy of requirements that is aligned with the hierarchical model structure. The derived safety cases reflect the results of the analysis, and provide a high-level argument that traces the requirements on the model via the inferred model structure to the code. We illustrate our approach on flight code generated from hierarchical Simulink models by Real-Time Workshop
model-based software development, automated code generation, formal proofs, formal analysis, safety case, automated theorem proving
978-3-642-15650-2
68-81
Basir, Nurlida
dffded1c-37fe-46c1-8e07-ebd474acf37a
Denney, Ewen
cce9ba14-a1fd-4a7b-8e90-fcb234b53e1d
Fischer, Bernd
0c9575e6-d099-47f1-b3a2-2dbc93c53d18
Basir, Nurlida
dffded1c-37fe-46c1-8e07-ebd474acf37a
Denney, Ewen
cce9ba14-a1fd-4a7b-8e90-fcb234b53e1d
Fischer, Bernd
0c9575e6-d099-47f1-b3a2-2dbc93c53d18

Basir, Nurlida, Denney, Ewen and Fischer, Bernd (2010) Deriving safety cases for hierarchical structure in model-based development. 29th International Conference on Computer Safety, Reliability and Security, Vienna, Austria. 14 - 17 Sep 2010. pp. 68-81 . (doi:10.1007/978-3-642-15651-9_6).

Record type: Conference or Workshop Item (Paper)

Abstract

Model-based development and automated code generation are increasingly used for actual production code, in particular in mathematical and engineering domains. However, since code generators are typically not qualified, there is no guarantee that their output satisfies the system requirements, or is even safe. Here we present an approach to systematically derive safety cases that argue along the hierarchical structure in model-based development. The safety cases are constructed mechanically using a formal analysis, based on automated theorem proving, of the automatically generated code. The analysis recovers the model structure and component hierarchy from the code, providing independent assurance of both code and model. It identifies how the given system safety requirements are broken down into component requirements, and where they are ultimately established, thus establishing a hierarchy of requirements that is aligned with the hierarchical model structure. The derived safety cases reflect the results of the analysis, and provide a high-level argument that traces the requirements on the model via the inferred model structure to the code. We illustrate our approach on flight code generated from hierarchical Simulink models by Real-Time Workshop

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e-pub ahead of print date: September 2010
Venue - Dates: 29th International Conference on Computer Safety, Reliability and Security, Vienna, Austria, 2010-09-14 - 2010-09-17
Keywords: model-based software development, automated code generation, formal proofs, formal analysis, safety case, automated theorem proving
Organisations: Electronic & Software Systems

Identifiers

Local EPrints ID: 271426
URI: http://eprints.soton.ac.uk/id/eprint/271426
ISBN: 978-3-642-15650-2
PURE UUID: 00336715-0a41-4d88-ab55-b96c34b162a5

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Date deposited: 20 Jul 2010 10:30
Last modified: 14 Mar 2024 09:30

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Contributors

Author: Nurlida Basir
Author: Ewen Denney
Author: Bernd Fischer

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