Disruption Impact Estimating Tool--Transportation (DIETT): A Tool for Prioritizing High-Value Transportation Choke Points (2006) / Chapter Skim
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P A R T 1 Final Report
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C O N T E N T S 5 Chapter 1 Introduction 5 1.1 Background 5 1.2 System Design 6 1.3 Using DIETT 6 1.4 Limitations 8 Chapter 2 Estimating Methodology -- The Algorithms 8 2.1 Increased Cost of Freight Movement 8 2.2 Increased Business Inventory Costs 9 2.3 Recommended Use 12 Appendix Summary of CATS Features
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; and a summary discussion of the key algorithms used in DIETT. 1.1 Background The goal of the research conducted under NCHRP Project 20-59(9)
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Generally, the generalizations in the algorithms imply a greater degree of uniformity and precision than really exists. Further limitations are introduced from external sources, predomi6 Security Caution DIETT is an analytical tool that helps users to prioritize transportation choke points (1)
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The structure and flow of the Disruption Impact Estimating Tool -- Transportation (DIETT)
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8This chapter presents the summary methodology used in DIETT to estimate the transportation and economic costs of a disruption to a TCP. The methodology is designed to generate net national economic impacts as a function of commercial shipments (used interchangeably with freight movement)
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Increased time en route affects surface transportation also, but is less noticeable because the time factor is small and the effect is distributed among many small shipments. However, in the aggregate, the effect can be significant.
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Exhibit 3. The output page of the DIETT spreadsheet application.
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11 Exhibit 5. ArcGIS (version 9.0)
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12 The Consequences Assessment Tool Set (CATS) is a powerful disaster analysis system for natural and technological hazards.
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