Transportation-Based Framework for Deriving Perturbations to the Inoperability Input-Output Model
Publication: Journal of Infrastructure Systems
Volume 14, Issue 4
Abstract
The Inoperability Input-Output Model (IIM) provides a mechanism to enable examination of interdependencies among economic sectors to estimate the effects of a disruptive event. In previous IIM applications, parametric analyses were used to represent uncertain model inputs that created ambiguity in physical interpretations. This paper develops a transportation-based framework for decomposing the IIM inputs into two components: (1) workforce and (2) commodity flows. For workforce analysis, we estimate the number of workers using a particular asset, the normal income level, and the reduced income resulting from a disruption. For commodity analysis, we estimate the value of goods traveling across a particular asset and the resulting reduction due to a disruption. The workforce and commodity formulations were demonstrated using an ex post analysis of the 2003 closure of Virginia’s Midtown Tunnel. The study utilized a computer tool to execute the model and to perform sensitivity analysis to account for the data uncertainties.
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Information & Authors
Information
Published In
Journal of Infrastructure Systems
Volume 14 • Issue 4 • December 2008
Pages: 293 - 304
Copyright
© 2008 ASCE.
History
Received: Jan 9, 2007
Accepted: Jan 29, 2008
Published online: Dec 1, 2008
Published in print: Dec 2008
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