ENGINEERING ECO ANALYSIS W/STUDY GUIDE
ENGINEERING ECO ANALYSIS W/STUDY GUIDE
13th Edition
ISBN: 9780190693053
Author: NEWNAN
Publisher: Oxford University Press
Question
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Chapter 8, Problem 19P
To determine

i.

Choice Table.

Expert Solution
Check Mark

Answer to Problem 19P

Deluxe is profitable with positive NPW between 0% to 14%
Regular is profitable with positive NPV between 0% to 21%
Economy is profitable with positive NPV between 0% to 24%

Explanation of Solution

Given:

Deluxe Regular Economy
First Cost $220,000 $125,000 $75,000
Useful Life 5 6 7
Salvage Value 16000 6900 3000

Calculation:

Year Prticulars Deluxe Regular Economy Incremental = Regular-Economy Incremental = Deluxe-Regular
0 First Cost ($220,000) ($125,000) ($75,000) ($50,000) ($95,000)
1 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
3 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
4 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
5 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
6 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
7 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
8 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
9 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
10 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
11 Annual Cost- Operating Cost $41,000 $30,000 $20,000 $10,000 $11,000
12 Annual Benefit-Operating Cost+Salvage Value $57,000 $36,900 $23,000 $16,900 $20,100
Incremental Rate of return 16.52% 5.32%
NPV of incremental cash flow at 15% MARR $3,175.40 ($35,473.19)
Interest Rate NPV of Deluxe NPV of Regular NPV of Economy
0% $231,000.00 $211,900.00 $148,000.00
1% $205,072.76 $192,213.48 $135,041.54
2% $181,260.77 $174,154.86 $123,149.75
3% $159,357.59 $157,563.43 $112,219.75
4% $139,179.55 $142,296.41 $102,158.28
5% $120,562.98 $128,226.71 $92,882.32
6% $103,361.86 $115,241.07 $84,317.85
7% $571,366.62 $103,238.37 $76,398.77
8% $72,697.53 ($90,833.33) $69,065.93
9% $59,012.81 $81,829.69 $62,266.41
10% $46,297.50 $72,270.24 $55,952.70
11% $34,467.13 $63,384.71 $50,082.16
12% $23,445.66 $55,114.56 $44,616.41
13% $13,164.59 $47,407.05 $39,520.92
14% $3,562.05 $40,214.65 $34,764.51
15% ($5,417.81) $33,494.46 $30,319.07
16% ($13,825.58) $27,207.71 $26,159.14
17% ($21,707.05) ($93,461.54) $22,261.70
18% ($29,103.78) $15,797.40 $18,605.86
19% ($36,053.50) $10,613.20 $15,172.69
20% ($42,590.54) $5,740.46 $11,944.97
21% ($48,746.12) $1,155.36 $8,907.02
22% ($54,548.72) ($3,163.82) $6,044.58
23% ($60,024.33) ($7,236.86) $3,344.64
24% ($65,196.69) ($11,081.83) $795.31
25% ($70,087.49) ($14,715.22) ($1,614.25)
26% ($74,716.63) ($18,152.13) ($3,893.99)
27% ($79,102.31) ($21,406.38) ($6,053.01)
28% ($83,261.26) ($24,490.66) ($8,099.65)
29% ($87,208.83) ($27,416.58) ($10,041.58)
30% ($90,959.14) ($30,194.85) ($11,885.84)
31% ($94,525.19) ($32,835.27) ($13,638.91)
32% ($97,918.95) ($35,346.91) ($15,306.75)
33% ($189,172.93) ($37,738.10) ($16,894.86)
34% ($104,232.93) ($40,016.52) ($18,408.32)
35% ($107,172.77) ($42,189.29) ($19,851.81)
36% ($109,979.71) ($44,262.97) ($21,229.66)
37% ($112,661.80) ($46,243.62) ($22,545.89)
38% ($115,226.53) ($48,136.87) ($23,804.20)
39% ($117,680.83) ($49,947.94) ($25,008.05)
40% ($120,031.14) ($51,681.66) ($26,160.62)
41% ($122,283.44) ($53,342.52) ($27,264.88)
42% ($124,443.30) ($54,934.69) ($28,323.60)
43% ($126,515.91) ($56,462.06) ($29,339.33)
44% ($128,506.07) ($57,928.24) ($30,314.47)
45% ($130,418.30) ($59,336.59) ($31,251.25)
46% ($132,256.78) ($60,690.26) ($32,151.74)
47% ($134,025.45) ($61,992.17) ($33,017.88)
48% ($135,727.96) ($63,245.07) ($33,851.49)
49% ($137,367.74) ($64,451.51) ($34,654.25)
50% ($138,948.00) ($65,613.89) ($35,427.76)
51% ($140,471.75) ($66,734.45) ($36,173.49)
52% ($141,941.80) ($67,815.29) ($36,892.85)
53% ($143,360.80) ($68,858.38) ($37,587.13)
54% ($144,731.22) ($69,865.56) ($38,257.56)
55% ($146,055.40) ($70,838.58) ($38,905.28)
56% ($147,335.54) ($71,779.07) ($39,531.39)
57% ($148,573.69) ($72,688.55) ($40,136.90)
58% ($149,771.80) ($73,568.47) ($40,722.76)
59% ($150,931.69) ($74,420.19) ($41,289.87)
60% ($152,055.10) ($75,245.00) ($41,839.09)
61% ($153,143.64) ($76,044.09) ($42,371.22)
62% ($154,198.86) ($76,818.61) ($42,887.01)
63% ($155,222.20) ($77,569.64) ($43,387.17)
64% ($156,215.04) ($78,298.18) ($43,872.39)
65% ($157,178.67) ($79,005.21) ($44,343.29)
66% ($158,114.32) ($79,691.63) ($44,800.49)
67% ($159,023.15) ($80,358.31) ($45,244.55)
68% ($159,906.27) ($81,006.05) ($45,676.02)
69% ($160,764.71) ($81,635.62) ($46,095.40)
70% ($161,599.47) ($82,247.77) ($46,503.18)
71% ($162,411.49) ($82,843.19) ($46,899.84)
72% ($163,201.65) ($83,422.53) ($47,285.79)
73% ($163,970.81) ($83,986.42) ($47,661.47)
74% ($164,719.77) ($84,535.46) ($48,027.26)
75% ($165,449.29) ($85,070.21) ($48,383.54)
76% ($166,160.11) ($85,591.21) ($48,730.66)
77% ($166,852.92) ($86,098.98) ($49,068.98)
78% ($167,528.38) ($86,593.99) ($49,398.81)
79% ($168,187.12) ($87,076.72) ($49,720.46)
80% ($168,829.74) ($87,547.61) ($50,034.23)
81% ($169,456.82) ($88,007.08) ($50,340.40)
82% ($170,068.89) ($88,455.54) ($50,639.23)
83% ($170,666.49) ($88,893.36) ($50,930.98)
84% ($171,250.11) ($89,320.92) ($51,215.90)
85% ($171,820.23) ($89,738.57) ($51,494.22)
86% ($172,377.30) ($90,146.64) ($51,766.16)
87% ($172,921.76) ($90,545.45) ($52,031.94)
88% ($173,454.02) ($90,935.31) ($52,291.75)
89% ($173,974.49) ($91,316.52) ($52,545.80)
90% ($174,483.55) ($91,689.36) ($52,794.28)
91% ($174,981.56) ($92,054.09) ($53,037.36)
92% ($175,468.88) ($92,410.97) ($53,275.21)
93% ($175,945.83) ($92,760.26) ($53,507.99)
94% ($176,412.75) ($93,102.18) ($53,735.88)
95% ($176,869.95) ($93,436.97) ($53,959.01)
96% ($177,317.71) ($93,764.85) ($54,177.54)
97% ($177,756.33) ($94,086.02) ($54,391.60)
98% ($178,186.08) ($94,400.69) ($54,601.33)
99% ($178,607.23) ($94,709.04) ($54,806.86)
100% ($179,020.02) ($95,011.28) ($55,008.30)

Conclusion:

Deluxe is profitable with positive NPW between 0% to 14%
Regular is profitable with positive NPV between 0% to 21%
Economy is profitable with positive NPV between 0% to 24%
To determine

ii.

Alternative to be selected when MARR=15%.

Expert Solution
Check Mark

Answer to Problem 19P

Incremental from Regular to deluxe (Deluxe-Regular) is not profitable as incremental rate of return is less than 15% 5.32%
Incremental from economy to Regular (Regular-Economy) is not profitable as incremental rate of return is less than 15% 16.52%

Explanation of Solution

Given:

Deluxe Regular Economy
First Cost $220,000 $125,000 $75,000
Useful Life 5 6 7
Salvage Value 16000 6900 3000

Concept used:

Incremental from Regular to deluxe (Deluxe-Regular) is not profitable as incremental rate of return is less than 15% 5.32%
Incremental from economy to Regular (Regular-Economy) is not profitable as incremental rate of return is less than 15% 16.52%

Conclusion:

Incremental from Regular to deluxe (Deluxe-Regular) is not profitable as incremental rate of return is less than 15% 5.32%
Incremental from economy to Regular (Regular-Economy) is not profitable as incremental rate of return is less than 15% 16.52%

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