Lifelines interdependencies : a scoping study to determine an appropriate modelling methodology

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Buxton, R.; Wright, K.C. 2011 Lifelines interdependencies : a scoping study to determine an appropriate modelling methodology. Lower Hutt, N.Z.: GNS Science. GNS Science report 2011/19 22 p.

Abstract: This report summarises a scoping project examining the applicability of various quantitative methodologies for modelling lifeline utility interdependence. Methodologies were identified following a literature review of international research into lifeline interdependency modelling. A pilot scoping study was conducted using Napier City water, sewage, road, stormwater and electricity utilities. Criteria for testing the seven identified modelling methodologies were: 1. The model has to be able to represent a set of lifeline utility networks. - 2. The model must be able to simulate component failures. - 3. The model should be able to accommodate a time step and feedback loops. - 4. The model should be able to use functional (engineering based) or probabilistic relationships to describe the dependencies between components. - 5. The dependencies should be in a form that is easily elicited from reports and experts. - 6. The model should be able to be proof-of-concept prototyped quickly. - 7. The fully developed prototype should be compatible with RiskScape. After scoring methodologies against the criteria, agent-based modelling was selected as the most appropriate methodology for continuation of the project past the scoping stage into the model testing phase. (auth)