Life Cycle Cost Analysis

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Life Cycle Cost Analysis

  1. 1. Life Cycle Cost Analysis Wali Memon1 Wali Memon
  2. 2. What is Life Cycle Cost (LCC) Analysis? A method of calculating the cost of a system over its entire life span.2 Wali Memon
  3. 3. Objectives of LCC Analysis Evaluate the economic effectiveness of different mutually exclusive investment alternatives over a certain period Identify the most cost-effective alternative3 Wali Memon
  4. 4. Analysis Period A time frame that is sufficiently long to reflect differences in performance among different strategy alternatives.4 Wali Memon
  5. 5. Selection of Analysis Period It is necessary to select an analysis period over which the alternatives are compared.5 Wali Memon
  6. 6. Pavement Rehabilitation Project Analysis period is considered starting at the end of the performance period of the original pavement.6 Wali Memon
  7. 7. Rehabilitation strategy analysis period7 beginning at the end of original pavement Wali Memon performance period
  8. 8. Example 1 Common Performance Period All the investment alternatives have the same performance period.8 Wali Memon
  9. 9. Common Performance Period Performance curves for rehabilitation alternatives expected to exhibit notably different performance over the common performance period.9 Wali Memon
  10. 10. Selection of analysis period for alternatives with common performance period, but different performance10 Wali Memon
  11. 11. Options for Defining the Analysis Period The least common multiple of the performance periods of all the alternatives The shortest of the performance periods among the alternatives The longest of the performance periods of the alternatives Some other time period11 Wali Memon
  12. 12. Comparisons of Various Options For relatively longer performance periods, use of least common multiple of the performance periods can result in an extremely long and unrealistic analysis period. The use of shortest performance period may adversely affect those alternatives with better long-term performance and favor those with short performance periods. The longest performance periods is recommended as the analysis period.12 Wali Memon
  13. 13. Example 2 Unequal Performance Periods Alternatives having different performance periods, which are expected to be able to keep the pavement condition above the minimum acceptable level for different lengths of time.13 Wali Memon
  14. 14. Unequal Performance Periods The analysis period is recommended to be no less than the performance period of the longest surviving alternative. Using a shorter analysis period (equal to the performance period of one of the shorter-lived alternatives) would not fully capture the anticipated differences in performance.14 Wali Memon
  15. 15. Selection of analysis period for alternatives with unequal performance periods15 Wali Memon
  16. 16. Unequal Performance Periods While using a longer analysis period, the follow-up rehabilitation treatments would have to be assigned to all three alternatives.16 Wali Memon
  17. 17. Selection of analysis period to encompass follow-up rehabilitation for all alternatives17 Wali Memon
  18. 18. Comments One or more of the alternatives may have a follow-up rehabilitation performance period which extends beyond the end of the analysis period. FHWA recommends an analysis period of at least 35 years for all projects (new construction as well as rehabilitation)18 Wali Memon
  19. 19. Bottom Line of Analysis Period Analysis period should be selected sufficiently long to reflect significant differences in performance among the different strategy alternatives.19 Wali Memon
  20. 20. Discount Rate Refers to the rate of change of true value of money over time, considering fluctuations in both investment interest rates and the rate of inflation. Discount rate is approximately equal to the interest rate minus the inflation rate.20 Wali Memon
  21. 21. Selection of Interest Rate Philosophy 1: A zero interest rate is appropriate when tax monies are used for financing. Philosophy 2: The interest rate need only reflect the “societal rate of time preference”.21 Wali Memon
  22. 22. Selection of Interest Rate Philosophy 3: The appropriate interest rate is dictated by the opportunity cost of those investments forgone by private investors who pay taxes or purchase bonds.22 Wali Memon
  23. 23. Selection of Interest Rate Philosophy 4: The appropriate interest rate is dictated by the opportunity cost of those investments forgone by budget agencies due to budget constraints.23 Wali Memon
  24. 24. Selection of Interest Rate Philosophy 5: The interest rate should match that paid by government for borrowed money. The rate at which governments can borrow money is felt to be appropriate for evaluating highway improvement projects.24 Wali Memon
  25. 25. Typical Discount Rate Discount rates used by State DOTs in life cycle cost analysis vary from 0 to 10 percent, with typical values between 3 and 5 percent, and overall average rate of 4 percent.25 Wali Memon
  26. 26. Monetary Agency Cost Costs associated with the alternative that are incurred by the agency during the analysis period, which can be expressed in monetary terms.26 Wali Memon
  27. 27. Monetary Agency Cost Includes the following: Initial rehabilitation design and construction costs Follow-up rehabilitation design and construction costs Annual maintenance costs Traffic control costs during construction Demolition and removal costs, or residual value of the pavement structure27 Wali Memon
  28. 28. User Costs Costs associated with the alternative that are incurred by the users of a roadway over the analysis period, which can be expressed in monetary terms.28 Wali Memon
  29. 29. Categories of User Costs • Vehicle operating costs - fuel and oil, wear on tires and other parts, registration, insurance, and others • Delay costs - due to reduced speed and/or use of alternate routes • Crash costs - damage to the user’s/other vehicles, public/private property, as well as injuries29 Wali Memon
  30. 30. Vehicle Operating Costs In-service vehicle operating costs are a function of pavement serviceability level, which is often difficult to estimate. Tools are available to model these costs, such as World Bank’s Highway Design and Maintenance Standards Model (HDM-III), FHWA’s Highway Investment Analysis Package (HIAP-Revised), AASHTO Red Book, and others.30 Wali Memon
  31. 31. Delay Costs Costs associated with the value of time. Vary by vehicle class, trip type and trip purpose. A function of demand for use of the roadway with respect to roadway capacity. Work zone user delay costs may be significantly different for different rehabilitation alternatives.31 Wali Memon
  32. 32. Crash Costs In-service crash rates for different roadway functional classes and crash severities are well known. Work zone crash rates may differ significantly for different rehabilitation alternatives.32 Wali Memon
  33. 33. Other Monetary Costs Those incurred by parties other than the agency or the users of the roadway. Owners of properties and businesses adjacent to or near the route under study. Municipalities whose sales tax receipts might be reduced during the period that the nearby businesses were adversely affected.33 Wali Memon
  34. 34. Salvage Value The residual value that can be attributed to the alternative at the end of the analysis period. The value that the item would have in the market place. Must be defined the same way for all alternatives.34 Wali Memon
  35. 35. Compare Strategies Present Worth Equivalent Uniform Annual Cost Future Worth Internal Rate of Return External Rate of Return Benefit/Cost Ratio Payback Period Capitalized Worth35 Wali Memon
  36. 36. Sensitivity of Life Cycle Cost Analysis to Key Parameters Factors that are more sensitive: The analysis period and performance period The predicted traffic over the design and analysis periods The initial investment The discount rate The timing of follow-up maintenance and rehabilitation activities The quantities associated with initial and follow- up maintenance and rehabilitation36 Wali Memon

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