How does dTIMS work?

Contents Strategies Cost Benefit Optimization methods Selection of Strategies Analysis Procedure

Generating Treatment Strategies Cost A Benefit A Strategy A Cost B Road Condition Strategy B Benefit B Strategy C Cost C Benefit C

Cost Benefit Object Function Maximize Area under Curve Minimize Total Transportation Cost Maximize Saving in VOC

Area Under Curve (AUC) Composite Index Analysis Period Time Benefit Strategy Composite Index Salvage Do-nothing Analysis Period Time

Minimize Total Transportation Cost (TTC) Optimum Maintenance Total Transport Costs COSTS Road User Costs Maintenance Costs Construction Costs MAINTENANCE LEVEL

Maximize Saving in VOC VOC Analysis Period Time Benefit Do-nothing Strategy Analysis Period Time

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

Selection of Strategies (Efficiency Frontiers) Benefits Costs IBC 2 3 4 5 B A

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

Running dTIMS Analysis

Outputs Performance Index Performance Modeling Composite Index Expressions And Filters Resets Triggers Costs Optimize Treatments Generate Strategies

Steps in Repetitive Analysis Create Source File from Database Update Treatment Costs (Interface) Change Analysis Period Generate Strategies Optimization Adjust Program Generate Reports

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

System Parameters Modelling parameters to all analyses Analysis period e.g. 1995 - 2015 Discount Rate e.g. 12% Currency Unit e.g. Rps.

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

Optimization Budget Scenarios 1 2 3 4

Reporting with dTIMS

Views in dTIMS Inventory Data Base Budget Scenario Summary Strategy List Condition Distribution Analysis Set Summary Maintenance Program Performance Graphs (6)

Exporting Data Copy Paste Table Export

Exporting Graphs Formatting Exporting

Example Bar Chart

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

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

Example Distribution of Treatment Types

Example Construction Program