Reyhaneh Sadeghi

Metrolinx · Safety and System Assurance

Validation is a prominent challenge in the domain of risk management in general, and hazard analysis in particular. Practitioners have highlighted a lack of clear guidance on how to perform validation of hazard analyses, who should be involved, and when to stop the validation process. Aiming to contribute to addressing this issue, this study propos...

In recent years, scholars have increasingly delved into the theoretical foundations and issues surrounding risk and safety science. However, validation has not received much explicit attention although it has been highlighted as an important focus theme. To contribute to closing this gap, this thesis first explores the current state of practice in...

While many hazard analysis techniques exist, little empirical research has been dedicated to their use in industrial contexts, in particular concerning how practitioners validate hazard analyses. This raises questions about the accuracy, comprehensiveness, and credibility of safety analyses, and how practitioners consider this issue in relation to...

Since its inception, the STPA technique has gained increasing popularity among researchers and industry practitioners. Nevertheless, the validity of its application has not yet received much scientific attention. Although some informal validation approaches have been used by STPA users, no formalized validation framework has been elaborated for pra...

Even though validation is an important concept in safety research, there is comparatively little empirical research on validating specific safety assessment, assurance, and ensurance activities. Focusing on model-based safety analysis, scant work exists to define approaches to assess a model’s adequacy for its intended use. Rooted in a wider concer...