A. James Clark School of Engineering
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The collections in this community comprise faculty research works, as well as graduate theses and dissertations.
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Item Construction and Verification of a Bayesian Network for Third-Party Excavation Risk Assessment (BaNTERA)(Probabilistic Safety Assessment and Management (PSAM16), 2022-06-26) Schell, Colin A.; Ruiz-Tagle, Andres; Lewis, Austin D.; Groth, Katrina M.; Groth, Katrina M.According to the Pipeline and Hazardous Material Safety Administration (PHMSA), thirdparty damage is a leading cause of natural gas pipeline accidents. Although the risk of third-party damage has been widely studied in the literature, current models do not capture a sufficiently comprehensive set of up-to-date root cause factors and their dependencies. This limits their ability to achieve an accurate risk assessment that can be traced to meaningful elements of an excavation. This paper presents the construction, verification, and validation of a probabilistic Bayesian network model for third-party excavation risk assessment, BaNTERA. The model was constructed and its performance verified using the best available industry data and previous models from multiple sources. Historical industry data and nationwide statistics were compared with BaNTERA’s damage rate predictions to validate the model. The result of this work is a comprehensive risk model for the third-party damage problem in natural gas pipelines.Item Managing Risk Assessment Stakeholder Engagement Processes: A Case Study(2014) Leveridge, M. Dianne; Baecher, Greg; Civil Engineering; Digital Repository at the University of Maryland; University of Maryland (College Park, Md.)Risk engineers conduct comprehensive risk assessments for many types of large projects, often singularly focused on the technical assessment and its value to the technical engineering team. Limiting or excluding community stakeholder involvement from the assessment process increases stakeholder skepticism, apprehension, and mistrust regarding safety, health and welfare of those stakeholders living or working nearby. Social experts have repeatedly documented connections between perception framing, communication processes, and risks. This research considers the connections between stakeholder perceptions and communication plans associated with risks listed in the risk register, and communication plans designed based upon including social expert suggestions for six projects: three bio-safety laboratories; two levee system assessment projects; and one Superfund site. The project risk assessment value is researched through the lens of risk perception and communication planning via the risk register. The concept of a Risk Perception Management (RPM) Plan developed in collaboration with social science experts and integrated with the risk register is presented. This research shows how the RPM concept iteratively captures stakeholder perceptions to build associated communication plans, thus increasing risk assessment value for stakeholders and decision-makers.