1. Three mutually exclusive design alternatives are being considered. The estimated cash flows for each alternative are given in the table below. The MARR of the company is 20% per year. At the end of its useful life, the investment will be sold with end-of-life market values given in the table. A B с $28,000 $55,000 $40,000 $15,000 $13,000 $22,000 $23,000 $28,000 $32,000 $8,000 $10,000 10 years 10 years 24.7% 22.4% Investment cost Annual expenses Annual revenues Market value at the end of life $6,000 Useful life 10 years IRR 26.4% (a) Explain why the decision should not be made by comparing IRR values for the three alternatives. (b) Recommend the best alternative by using an appropriate method.

ENGR.ECONOMIC ANALYSIS
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Chapter1: Making Economics Decisions
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1.
Three mutually exclusive design alternatives are being considered. The
estimated cash flows for each alternative are given in the table below. The MARR of
the company is 20% per year. At the end of its useful life, the investment will be sold
with end-of-life market values given in the table.
A
B
$28,000 $55,000
$15,000
$13,000
$23,000 $28,000
$8,000
10 years
24.7%
Investment cost
Annual expenses
Annual revenues
Market value at the end of life $6,000
Useful life
10 years
IRR
26.4%
с
$40,000
$22,000
$32,000
$10,000
10 years
22.4%
(a) Explain why the decision should not be made by comparing IRR values for the
three alternatives.
(b) Recommend the best alternative by using an appropriate method.
Transcribed Image Text:1. Three mutually exclusive design alternatives are being considered. The estimated cash flows for each alternative are given in the table below. The MARR of the company is 20% per year. At the end of its useful life, the investment will be sold with end-of-life market values given in the table. A B $28,000 $55,000 $15,000 $13,000 $23,000 $28,000 $8,000 10 years 24.7% Investment cost Annual expenses Annual revenues Market value at the end of life $6,000 Useful life 10 years IRR 26.4% с $40,000 $22,000 $32,000 $10,000 10 years 22.4% (a) Explain why the decision should not be made by comparing IRR values for the three alternatives. (b) Recommend the best alternative by using an appropriate method.
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