Construction Engineering & Management - Vol 1 | 21. Introduction to Defender and Challenger Equipment by Abraham | Learn Smarter
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21. Introduction to Defender and Challenger Equipment

21. Introduction to Defender and Challenger Equipment

The chapter discusses the analysis of replacing existing equipment with new proposed equipment using economic evaluation methods. It specifically addresses how to perform replacement analysis by considering relevant costs such as operating and maintenance costs while disregarding sunk costs and initial purchase prices. A comparison between two machines, the defender and the challenger, illustrates the application of the annual worth method in determining the more economical option.

27 sections

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Sections

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  1. 1
    Introduction To Defender And Challenger Equipment

    This section discusses the evaluation of defender and challenger equipment,...

  2. 1.1
    Operating And Maintenance Costs Comparison

    This section discusses a comparative analysis of operating and maintenance...

  3. 1.2
    Salvage Value And Life Of Challenger

    This section discusses the financial analysis necessary to evaluate whether...

  4. 1.3
    Objective Of Analysis

    This section presents a comparative analysis of the operating costs and...

  5. 2
    Information About The Defender

    This section discusses the operational and maintenance costs associated with...

  6. 2.1
    Irrelevant Initial Estimates

    This section discusses the irrelevance of initial estimates such as purchase...

  7. 2.2
    Relevant Costs For Replacement Analysis

    This section discusses the processes for analyzing the replacement of...

  8. 2.3
    Sunk Cost Explanation

    The section explains the concept of sunk costs in relation to equipment...

  9. 2.4
    Current Market Value And Remaining Life

    This section discusses the comparison between existing and proposed...

  10. 3
    Equivalent Annual Cost Calculation For Defender

    This section discusses the evaluation of the current equipment (Defender)...

  11. 3.1
    Cash Flow Diagram For Defender

    This section discusses the cash flow analysis for comparing existing and...

  12. 3.2
    Conversion Of Initial Cost To Eac

    This section discusses the conversion of initial equipment costs into...

  13. 3.3
    Calculation Of Operating And Maintenance Costs

    This section discusses the analysis of operating and maintenance costs for...

  14. 3.4
    Salvage Value Conversion To Eac

    This section discusses the analysis of equipment replacement, particularly...

  15. 4
    Summary Of Defender's Equivalent Annual Cost

    This section discusses the evaluation of the equivalent annual cost of...

  16. 4.1
    Final Equivalent Annual Cost For Defender

    This section examines how to calculate and compare the equivalent annual...

  17. 5
    Equivalent Annual Cost Calculation For Challenger

    This section focuses on computing the equivalent annual cost for a proposed...

  18. 5.1
    Cash Flow Diagram For Challenger

    This section outlines the comparison of operating costs and salvage values...

  19. 5.2
    Initial Cost Conversion To Eac For Challenger

    This section compares the costs of retaining the old equipment (defender)...

  20. 5.3
    Salvage Value Conversion To Eac For Challenger

    This section discusses the process of evaluating whether to retain or...

  21. 5.4
    Summary Of Challenger's Equivalent Annual Cost

    In this section, we analyze the Challenger's Equivalent Annual Cost to...

  22. 6
    Final Comparison And Analysis

    This section discusses the analysis for replacing old equipment (defender)...

  23. 6.1
    Decision To Replace Defender With Challenger

    This section discusses the decision-making process involved in replacing an...

  24. 7
    Conclusion Of Lecture 8

    This section summarizes the analysis and decision-making process regarding...

  25. 7.1
    Summary Of Replacement Analysis Principles

    This section discusses the principles of replacement analysis, focusing on...

  26. 7.2
    Reference Textbooks

    This section covers the analysis of defender and challenger equipment,...

  27. 7.3
    Next Lecture Preview

    This section reviews the concepts of replacement analysis comparing defender...

What we have learnt

  • The replacement analysis should focus on current trading values and relevant costs rather than historical or sunk costs.
  • Calculating the equivalent annual cost helps compare different equipment options for informed decision-making.
  • Economic life of equipment is defined by the minimum equivalent uniform annual cost.

Key Concepts

-- Sunk Cost
A cost that has already been incurred and cannot be recovered; it should not affect future investment decisions.
-- Equivalent Annual Cost (EAC)
A method used to compare the annual costs associated with an asset over its lifespan, allowing for better replacement decisions.
-- Uniform Series Capital Recovery Factor
A factor used to convert a present value into an equivalent annual amount over a specified number of periods at a given interest rate.
-- Operating and Maintenance Costs
Recurring expenses associated with the regular operation and upkeep of equipment.

Additional Learning Materials

Supplementary resources to enhance your learning experience.