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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.

Sections

Economic Life of a Machine

This section explores the concept of economic life in machines, detailing how costs associated with machine ownership can escalate beyond a certain period.

1 Section Overview

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1.1 Introduction to Economic Life

This section discusses the concept of economic life, detailing the optimal period for machinery use to minimize costs associated with operating, maintenance, and obsolescence.

1.2 Example of Estimating Economic Life

This section explores the concept of economic life and its significance in machine cost estimation, including how to identify optimal replacement times based on associated costs.

Parameters for Replacement Analysis

This section explores the factors that determine the economic life of machinery and the essential concepts behind replacement analysis.

2 Section Overview

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2.1 Hourly Maintenance and Repair Costs

This section discusses the economic life of machines, focusing on maintenance and repair costs associated with machine use and replacement.

2.2 Downtime Costs

This section explores the concept of economic life in machinery and how downtime costs, maintenance, repair, and obsolescence can affect total costs over time.

2.3 Obsolescence Costs

This section discusses the concept of obsolescence costs, the reasons for increased costs associated with aging machinery, and the importance of analyzing the economic life of equipment to optimize replacement timing.

Costs Associated with the Machine

This section discusses the concept of economic life and the associated costs of holding a machine, highlighting the significance of replacement analysis.

3 Section Overview

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3.1 Replacement Cost Estimates

This section discusses the economic life of machinery and the factors affecting replacement cost estimates.

3.2 Depreciation Calculation

This section explains the concept of economic life and depreciation calculation, focusing on the costs associated with maintaining and replacing machinery.

3.3 Loss Associated with Replacement

This section discusses the economic life of machines and the associated costs of replacing old machines to minimize losses.

3.4 Cumulative Usage and Costs per Hour

This section discusses the economic life of machines, emphasizing the need for timely replacement to minimize costs and optimize usage.

Investment Costs

This section discusses the concept of investment costs related to machines, focusing on their components like depreciation, maintenance, and obsolescence.

4 Section Overview

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4.1 Calculation of Investment Costs

This section covers the concept of economic life in machinery investment, detailing how to calculate costs associated with machine ownership and operation.

4.2 Cumulative Investment Costs

This section explains the concept of cumulative investment costs, focusing on economic life, depreciation, and replacement analysis of machinery.

Maintenance and Repair Costs

This section explains the economic life of machinery, maintenance and repair costs, and how these factors influence replacement decisions.

5 Section Overview

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5.1 Calculation of Maintenance and Repair Costs

This section discusses the concept of economic life in machines, detailing how to calculate maintenance, repair, and replacement costs over time.

5.2 Cumulative Maintenance Costs

This section discusses the economic life of machinery and the cumulative costs associated with maintenance, including depreciation, repair costs, and obsolescence, emphasizing when to replace equipment.

5.3 Downtime Costs Calculation

This section focuses on calculating the economic life of a machine and analyzing downtime costs related to its operation and maintenance.

Learning Objectives

  • 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.

Practice Exercises

Total Questions

2

Estimated Time

4 min

Passing Score

70%

Instructions

  • Read each question carefully
  • You can use hints if you need help
  • Complete all questions before submitting
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