benjamin krom, pe michigan department of transportation
TRANSCRIPT
Life Cycle Cost AnalysisBasics
Benjamin Krom, PEMichigan Department of Transportation
Presentation Disclaimer
Presentation is based on Federal Highway Administration guidance for conducting LCCAs
MDOT’s LCCA practice differs, partially to meet Public Act 79 of 1997 (MCL 247.651h) requirements
LCCA: What is it?
2012 MAP-21 definition:
“…a process for evaluating the total economic
worth of a usable project segment by analyzing
initial costs and discounted future costs, such
as maintenance, user, reconstruction,
rehabilitation, restoring, and resurfacing costs,
over the life of the project segment.”
LCCA: What is it?
Basic parts: A process to evaluate competing
alternatives Well-founded economic analysis principles Total costs over the entire life of the asset
AKA: Total cost of ownership analysis Whole-life cost analysis “Cradle to grave” analysis “Womb to tomb” analysis
LCCA: What it IS
An analytical tool
to provide a cost comparison
between 2 or more competing design
alternatives
producing equivalent benefits
for the project being analyzed.
Source: National Highway Institute Course No. 131113
LCCA: What it IS
“It attempts to identify the best
value (the lowest long-term cost
that satisfies the performance
objective being sought) for
investment expenditures.”Source: FHWA, Life-Cycle Cost Analysis in Pavement Design
LCCA: What it is NOT
Benefit-cost analysis Used to compare project alternatives
that:▪ Do not provide identical benefits▪ Accomplish different objectives▪ Determine if the project should be done at all
LCCA: What can be included?
For Pavements: Initial construction costs Future rehabilitation/maintenance costs User delay costs (initial & future) Salvage value/remaining service life
value
LCCA Process Steps
1. Establish pavement design alternatives
2. Determine maintenance/rehab timing
3. Estimate agency & user costs
4. Compute life-cycle costs
5. Analyze the results
Source: National Highway Institute Course No. 131113
Step 1: Establish Alternatives
Develop at least 2 mutually exclusive pavement design options
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Step 1: Establish Alternatives
Develop at least 2 mutually exclusive pavement design alternatives
Future maintenance/rehab activities Forecasted maintenance schedules Historical practices
Source: FHWA, Life-Cycle Cost Analysis in Pavement Design
Step 1: Establish Alternatives
Develop at least 2 mutually exclusive pavement design alternatives
Future maintenance/rehab activities Forecasted maintenance schedules Historical practices
Choose an analysis period Typically, long enough to capture at least
1 maintenance/rehabilitation activity Same for all alternatives
Step 2: Maintenance Timing
When will the future maintenance & rehabilitation costs be incurred?
Source: FHWA, Life-Cycle Cost Analysis Primer
Step 3: Estimate Costs
Include cost elements that are different between alternatives
Exclude cost elements that are the same between alternatives Agency overhead costs Normal operations user costs Planting grass, installing guardrail, etc.
Source: National Highway Institute Course No. 131113
Step 3: Estimate Costs
Source: National Highway Institute Course No. 131113
Salvage
Value(if
used)
Step 3: Estimate Costs
Source: MDOT Pavement Design & Selection Manual
Step 4: Compute Life-Cycle $’s
Source: National Highway Institute Course No. 131113
Step 4: Compute Life-Cycle $’s
Source: National Highway Institute Course No. 131113
Step 5: Analyze the Results
Compare agency & user costs between the design alternatives
Typically NOT the final decision; consider: Risk Available budgets Politics Environmental concerns Others
Step 5: Analyze the Results
“…the overall benefit of conducting a
life-cycle cost analysis is not
necessarily the LCCA results
themselves, but rather how the
designer can use the information
resulting from the analysis to modify
the proposed alternatives and develop
more cost-effective strategies.”
Source: FHWA, Life-Cycle Cost Analysis in Pavement Design
LCCA Sources/References Basic:
Life-Cycle Cost Analysis Primer (FHWA Publication; August 2002)
Intermediate: Life-Cycle Cost Analysis in Pavement
Design (FHWA Publication; September 1998)
Advanced: Guide for Pavement-Type Selection (NCHRP Report 703; 2011)
Questions?