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Ministry of Transport, Public Works and Water Management. New Developments in Life-Cycle Cost Analysis of Civil Infrastructure. Leo Klatter. August 20th 2003. Presentation Outline. National Water and Road Network Life-Cycle Based Asset Management Case Study Main Road Network Conclusions.
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Ministry of Transport, Public Works and Water Management
New Developments in Life-Cycle Cost Analysis of Civil Infrastructure Leo Klatter August 20th 2003
Presentation Outline • National Water and Road Network • Life-Cycle Based Asset Management • Case Study Main Road Network • Conclusions
National Water Systems the Netherlands • 724 km canals • 828 km navigable rivers • 63.360 km2 water area • Object categories • Canal, river beds • Dikes, embankments • Structures • Water • Facilities
Main Road Network the Netherlands • 3200 km road, of which 2300 km motorway • Object categories • pavements • structures • traffic facilities • environmental assets
Management Challenges • Ageing structures • Maintenance cost increase • Rehabilitation and improvement necessary • Replacement comes in sight • User demands increase • Limited resources • Accountability and efficiency
Life-Cycle Based Asset Management USA Federal Highways Administration (FHWA) • Customer satisfaction and return on investment • Comprehensive; all asset classes of network • Record value long-lived infrastructure • Asset management; Life-Cycle Costing in broader context
Engineering Economics Business Practices Asset Management System Performance: Engineering – Cost-Efficient and Effective Economics – Optimal Resource Allocation Business Practices -Process Improvement
Engineering Design • Safety, reliability; design life time • Load < > strength Construction quality • Materials Preservation • Maintenance strategy • Condition
Economics Life-cycle cost analysis • Maintenance • Replacement • User cost Optimisation Return on investments Financial strategies
Business Practices Determines costs and performance to high extend! • Strategic planning • Operational planning • Inspections • Prioritization • Data systems => Reliable models are essential tools
Case Main Road Network • Maintenance cost • Strategic plan • Operational programs • Replacement
Bridge deck / Pavement Joint Main carrying element Guard rail Guard rail Railing bearing Abutment Pier Bridge Elements
Maintenance Strategy of Elements • Functional demands • Deterioration process • Measures • Type / extend • Intervals • Cost • Inspections
Maintenance Costs of a Typical Bridge Annual cost 14 €/m2
Strategic Document Needed Transparent budget estimate forms start of discussion
Strategic Document 10-page management summary Content: • Structure stock and its functionality • Maintenance strategy • Basic maintenance level • Options • Program and budget
Basic Maintenance Level Quality level Trafficsafety Environmental quality Appearance User comfort Mobility minimum
Operational practice • Life-cycle cost based on maintenance strategy for element types • Standard plan customised to individual bridge • Update with inspection results • Operational maintenance program
End of service life Decomposition / maintenance plan Operational maintenance program Adjusting the maintenance plan Clustering and optimization Inspection Maintenanceexecution
Strategic budget need Adjusting the maintenance plan Clustering and optimization Inspection End of service life Decomposition / maintenance plan Actual budgetneed Maintenanceexecution Position strategic document Road management Operational program Bridge management
“To replace or not to …..” Replace, rehabilitate or maintain Decision based on • Safety • Functionality • Economics • Available budgets
Replacement cost M Euro Design Practice Year Forecasted Replacement Cost
Research items • Integration of reliability and condition analysis using life-cycle cost approach => Beyond “living apart together” • Dealing with uncertainty in inspections => Modelling inspection strategy • Use of inspections for prediction => Matching strategy and reality • Modelling total life-cycle cost of structure stock => Merging maintenance and replacement
Colophon Ministry of Transport, Public Works and Water Management Civil Engineering Division