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

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.

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Sections

  • 1

    Introduction To Defender And Challenger Equipment

    This section discusses the evaluation of defender and challenger equipment, focusing on their operating costs, salvage values, and the replacement analysis through economic methods.

  • 1.1

    Operating And Maintenance Costs Comparison

    This section discusses a comparative analysis of operating and maintenance costs between current equipment (the defender) and proposed equipment (the challenger).

  • 1.2

    Salvage Value And Life Of Challenger

    This section discusses the financial analysis necessary to evaluate whether to retain or replace current equipment by comparing the costs and performance metrics of the defender and challenger hydraulic machines.

  • 1.3

    Objective Of Analysis

    This section presents a comparative analysis of the operating costs and value estimations between existing and proposed equipment to determine whether to retain or replace the current machine.

  • 2

    Information About The Defender

    This section discusses the operational and maintenance costs associated with the defender equipment and the information necessary for conducting a replacement analysis against a proposed challenger equipment.

  • 2.1

    Irrelevant Initial Estimates

    This section discusses the irrelevance of initial estimates such as purchase price and salvage value in equipment replacement analysis.

  • 2.2

    Relevant Costs For Replacement Analysis

    This section discusses the processes for analyzing the replacement of current equipment (defender) with proposed equipment (challenger), focusing on relevant costs and determining which option is economically favorable.

  • 2.3

    Sunk Cost Explanation

    The section explains the concept of sunk costs in relation to equipment replacement analysis, highlighting what should and shouldn't be considered.

  • 2.4

    Current Market Value And Remaining Life

    This section discusses the comparison between existing and proposed equipment based on operating costs, salvage values, and the concept of sunk costs in decision-making.

  • 3

    Equivalent Annual Cost Calculation For Defender

    This section discusses the evaluation of the current equipment (Defender) against a proposed equipment (Challenger) using the Equivalent Annual Cost (EAC) method by analyzing their operating costs, salvage values, and time durations.

  • 3.1

    Cash Flow Diagram For Defender

    This section discusses the cash flow analysis for comparing existing and proposed equipment, focusing on the defender and challenger.

  • 3.2

    Conversion Of Initial Cost To Eac

    This section discusses the conversion of initial equipment costs into equivalent annual costs (EAC) for two machines, enabling an informed replacement analysis.

  • 3.3

    Calculation Of Operating And Maintenance Costs

    This section discusses the analysis of operating and maintenance costs for existing and proposed equipment to determine the best option for replacement.

  • 3.4

    Salvage Value Conversion To Eac

    This section discusses the analysis of equipment replacement, particularly how to calculate equivalent annual costs for both existing and proposed machines.

  • 4

    Summary Of Defender's Equivalent Annual Cost

    This section discusses the evaluation of the equivalent annual cost of existing and proposed equipment to determine whether to retain or replace the current equipment.

  • 4.1

    Final Equivalent Annual Cost For Defender

    This section examines how to calculate and compare the equivalent annual costs of two machines: the Defender and the Challenger.

  • 5

    Equivalent Annual Cost Calculation For Challenger

    This section focuses on computing the equivalent annual cost for a proposed equipment (challenger) and comparing it with existing equipment (defender) to determine whether a replacement is advisable.

  • 5.1

    Cash Flow Diagram For Challenger

    This section outlines the comparison of operating costs and salvage values between an existing equipment (defender) and a proposed equipment (challenger) to determine which option is more cost-effective to retain or replace.

  • 5.2

    Initial Cost Conversion To Eac For Challenger

    This section compares the costs of retaining the old equipment (defender) with acquiring the new equipment (challenger) by calculating their equivalent annual costs (EAC).

  • 5.3

    Salvage Value Conversion To Eac For Challenger

    This section discusses the process of evaluating whether to retain or replace existing equipment by calculating the equivalent annual costs (EAC) for a defender and a challenger.

  • 5.4

    Summary Of Challenger's Equivalent Annual Cost

    In this section, we analyze the Challenger's Equivalent Annual Cost to determine whether to retain or replace existing equipment.

  • 6

    Final Comparison And Analysis

    This section discusses the analysis for replacing old equipment (defender) with a proposed new equipment (challenger) based on cost computations, particularly the equivalent annual costs.

  • 6.1

    Decision To Replace Defender With Challenger

    This section discusses the decision-making process involved in replacing an existing piece of equipment (Defender) with a proposed new machine (Challenger) by analyzing operational costs, salvage values, and conducting a replacement analysis.

  • 7

    Conclusion Of Lecture 8

    This section summarizes the analysis and decision-making process regarding equipment replacement, highlighting the cost evaluation of a defender versus a challenger.

  • 7.1

    Summary Of Replacement Analysis Principles

    This section discusses the principles of replacement analysis, focusing on the comparison of current and proposed equipment's costs and benefits over their economic lives.

  • 7.2

    Reference Textbooks

    This section covers the analysis of defender and challenger equipment, focusing on cost comparisons to aid replacement decisions.

  • 7.3

    Next Lecture Preview

    This section reviews the concepts of replacement analysis comparing defender and challenger equipment based on their costs and salvage values.

References

8 c.pdf

Class Notes

Memorization

What we have learnt

  • The replacement analysis sh...
  • Calculating the equivalent ...
  • Economic life of equipment ...

Final Test

Revision Tests