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How does dTIMS work?
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Contents Strategies Cost Benefit Optimization methods
Selection of Strategies Analysis Procedure
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Generating Treatment Strategies
Cost A Benefit A Strategy A Cost B Road Condition Strategy B Benefit B Strategy C Cost C Benefit C
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Cost Benefit Object Function Maximize Area under Curve
Minimize Total Transportation Cost Maximize Saving in VOC
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Area Under Curve (AUC) Composite Index Analysis Period Time Benefit
Strategy Composite Index Salvage Do-nothing Analysis Period Time
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Minimize Total Transportation Cost (TTC)
Optimum Maintenance Total Transport Costs COSTS Road User Costs Maintenance Costs Construction Costs MAINTENANCE LEVEL
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Maximize Saving in VOC VOC Analysis Period Time Benefit Do-nothing
Strategy Analysis Period Time
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Objective Function To Use
Const. Budget Poor Roads Med. Budget Poor Roads Adeq. Funding Good Roads Objective Function Area Under Curve Total Transportation Costs Vehicle Operating Costs
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Selection of Strategies (Efficiency Frontiers)
Benefits Costs IBC 2 3 4 5 B A
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Analysis Procedure A C B Benefits Costs A B C IBC Strategy Do Nothing
2 3 4 5 B C A A B C Strategy Do Nothing 2 3 4 5 Seal $ B Ovl $ B Recon $ B Seal $ B Ovl $ B Recon $ B Seal $ B Ovl $ B Recon $ B
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Running dTIMS Analysis
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Outputs Performance Index Performance Modeling Composite Index Expressions And Filters Resets Triggers Costs Optimize Treatments Generate Strategies
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Steps in Repetitive Analysis
Create Source File from Database Update Treatment Costs (Interface) Change Analysis Period Generate Strategies Optimization Adjust Program Generate Reports
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Analysis set Sections to include in an Analysis
May be all roads or a sub-set e.g. for a district only defined by a Group Expression
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System Parameters Modelling parameters to all analyses
Analysis period e.g Discount Rate e.g. 12% Currency Unit e.g. Rps.
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Treatment Strategies Defined by the type and timing of a Rehab Treatment e.g. Reconstruct in 1997; or Overlay in 1998 Strategy includes the Rehab and the later Periodic Treatments plus Routine “Do-nothing” is also a Strategy - the base case
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Optimization Budget Scenarios 1 2 3 4
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Reporting with dTIMS
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Views in dTIMS Inventory Data Base Budget Scenario Summary
Strategy List Condition Distribution Analysis Set Summary Maintenance Program Performance Graphs (6)
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Exporting Data Copy Paste Table Export
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Exporting Graphs Formatting Exporting
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Example Bar Chart
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Example Influence:Influence of Funding Scenarios
50 100 150 200 1999 2001 2003 2005 2007 2009 2011 Year Condition (NAASRA) Very Low Budget Low Budget Medium Budget High Budget Very High Budget
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Example Influence of Funding Scenarios
200 400 600 800 1000 1200 1999 2001 2003 2005 2007 2009 2011 Year Backlog Length (Km) Very Low Budget Low Budget Medium Budget High Budget Very High Budget
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Example Distribution of Treatment Types
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Example Construction Program
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