Construction Engineering & Management - Vol 1 | 16. Economic Life of a Machine by Abraham | Learn Smarter
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16. Economic Life of a Machine

16. Economic Life of a Machine

The economic life of machinery is defined as the period during which the cost of owning and operating the machine is minimized. It involves an analysis of various cost factors including repair, maintenance, downtime, and obsolescence and how they impact overall costs over time. This chapter presents a systematic approach to estimating the economic life through the application of the double declining balance method for depreciation and replacement analysis.

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  1. 1
    Economic Life Of A Machine

    This section explores the concept of economic life in machines, detailing...

  2. 1.1
    Introduction To Economic Life

    This section discusses the concept of economic life, detailing the optimal...

  3. 1.2
    Example Of Estimating Economic Life

    This section explores the concept of economic life and its significance in...

  4. 2
    Parameters For Replacement Analysis

    This section explores the factors that determine the economic life of...

  5. 2.1
    Hourly Maintenance And Repair Costs

    This section discusses the economic life of machines, focusing on...

  6. 2.2
    Downtime Costs

    This section explores the concept of economic life in machinery and how...

  7. 2.3
    Obsolescence Costs

    This section discusses the concept of obsolescence costs, the reasons for...

  8. 3
    Costs Associated With The Machine

    This section discusses the concept of economic life and the associated costs...

  9. 3.1
    Replacement Cost Estimates

    This section discusses the economic life of machinery and the factors...

  10. 3.2
    Depreciation Calculation

    This section explains the concept of economic life and depreciation...

  11. 3.3
    Loss Associated With Replacement

    This section discusses the economic life of machines and the associated...

  12. 3.4
    Cumulative Usage And Costs Per Hour

    This section discusses the economic life of machines, emphasizing the need...

  13. 4
    Investment Costs

    This section discusses the concept of investment costs related to machines,...

  14. 4.1
    Calculation Of Investment Costs

    This section covers the concept of economic life in machinery investment,...

  15. 4.2
    Cumulative Investment Costs

    This section explains the concept of cumulative investment costs, focusing...

  16. 5
    Maintenance And Repair Costs

    This section explains the economic life of machinery, maintenance and repair...

  17. 5.1
    Calculation Of Maintenance And Repair Costs

    This section discusses the concept of economic life in machines, detailing...

  18. 5.2
    Cumulative Maintenance Costs

    This section discusses the economic life of machinery and the cumulative...

  19. 5.3
    Downtime Costs Calculation

    This section focuses on calculating the economic life of a machine and...

What we have learnt

  • Economic life refers to the period in which the total cost of machine ownership is minimized.
  • Depreciation using double declining balance method and influence of inflation on replacement costs are critical in the analysis.
  • Factors like maintenance, downtime, and obsolescence contribute to the cumulative costs associated with a machine over its useful life.

Key Concepts

-- Economic Life
The duration during which a machine's operational costs are minimized, beyond which costs begin to rise.
-- Depreciation
The reduction in the value of an asset over time, calculated here using the double declining balance method.
-- Downtime Costs
The costs incurred due to the unavailability of machines for productive work, particularly associated with mechanical failures.
-- Obsolescence
The decrease in value of machines as new technologies or models render the existing ones less competitive.

Additional Learning Materials

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