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- W2947060778 abstract "The development process of safety-critical, software-intensive embedded systems is characterized by the need to identify hazards during safety assessment in early stages of development. During operation, such hazards may lead to harm to come to humans and external systems in the form of death, injury, damage, or destruction, respectively. In order to improve the safety of the system during operation, mitigations are conceived for each hazard, and documented during requirements engineering by means of hazard-mitigating requirements. These hazard-mitigating requirements must be adequate in the sense that they must specify the functionality required by the stakeholders and must render the system sufficiently safe during operation with regard to the identified hazards. The adequacy of hazard-mitigating requirements is determined during requirements validation. Yet, the validation of the adequacy of hazard-mitigating requirements is burdened by the fact that hazards and contextual information about hazards are a work product of safety assessment and hazard-mitigating requirements are a work product of requirements engineering. These work products are poorly integrated such that the information needed to determine the adequacy of hazard-mitigating requirements are not available to stakeholders during validation. In consequence, there is the risk that inadequate hazard-mitigating requirements remain covert and the system is falsely considered sufficiently safe.In this dissertation, an approach was developed, which visualizes hazards, contextual information about hazards, hazard-mitigating requirements, as well as their specific dependencies in graphical models. The approach hence renders these information accessible to stakeholders during validation. In addition, an approach to create these graphical models was developed and prototypically implemented. Moreover, the benefits of using these graphical models during validation of hazard-mitigating requirements was investigated and established by means of four detailed empirical experiments.The dissertation at hand hence provides a contribution towards the integration of the work products of safety assessment and requirements engineering with the purpose to support the validation of the adequacy of hazard-mitigating requirements." @default.
- W2947060778 created "2019-06-07" @default.
- W2947060778 creator A5053284216 @default.
- W2947060778 date "2017-11-29" @default.
- W2947060778 modified "2023-09-26" @default.
- W2947060778 title "Hazard Relation Diagrams - Definition and Evaluation" @default.
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- W2947060778 hasPublicationYear "2017" @default.
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