A school is overcrowded and there are three options. The do-nothing alternative corresponds to continuing to use modular classrooms. The school can be expanded, or a new school can be built to "split the load" between schools. If a new school is built, there are more benefits because more students will be able to walk to school, the average distance for those who ride the school buses will be shorter, and the schools will be smaller and more "student friendly". The disbenefits for the expanded school are due to the impact of the construction process during the school year. The interest rate is 8%, and the life of each alternative is 20 years. Which alternative should be selected? What is the incremental ratio for the preferred alternative?

ENGR.ECONOMIC ANALYSIS
14th Edition
ISBN:9780190931919
Author:NEWNAN
Publisher:NEWNAN
Chapter1: Making Economics Decisions
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Solve ONLY D and E !!!
A school is overcrowded and there are three options. The do-nothing alternative corresponds to continuing
to use modular classrooms. The school can be expanded, or a new school can be built to "split the load"
between schools. If a new school is built, there are more benefits because more students will be able to
walk to school, the average distance for those who ride the school buses will be shorter, and the schools
will be smaller and more "student friendly". The disbenefits for the expanded school are due to the impact
of the construction process during the school year. The interest rate is 8%, and the life of each alternative is
20 years. Which alternative should be selected? What is the incremental ratio for the preferred alternative?
Expand
New School
User benefits ($M/yr)
2.1
3.1
User disbenefits ($M)
0.8
First Cost ($M)
8.8
10.4
O&M ($M/yr)
0.95
1.7
a) Use the benefit-cost ratio
b) Use the modified benefit-cost ratio
c) Use the public/government version of the B/C ratio
d) Assume these numbers apply to a private firm and use a present worth index
e) Are your recommendations for a) through d) consistent? Which measure gives the largest value? Why?
Solve ONLY D and E !!!
Transcribed Image Text:Solve ONLY D and E !!! A school is overcrowded and there are three options. The do-nothing alternative corresponds to continuing to use modular classrooms. The school can be expanded, or a new school can be built to "split the load" between schools. If a new school is built, there are more benefits because more students will be able to walk to school, the average distance for those who ride the school buses will be shorter, and the schools will be smaller and more "student friendly". The disbenefits for the expanded school are due to the impact of the construction process during the school year. The interest rate is 8%, and the life of each alternative is 20 years. Which alternative should be selected? What is the incremental ratio for the preferred alternative? Expand New School User benefits ($M/yr) 2.1 3.1 User disbenefits ($M) 0.8 First Cost ($M) 8.8 10.4 O&M ($M/yr) 0.95 1.7 a) Use the benefit-cost ratio b) Use the modified benefit-cost ratio c) Use the public/government version of the B/C ratio d) Assume these numbers apply to a private firm and use a present worth index e) Are your recommendations for a) through d) consistent? Which measure gives the largest value? Why? Solve ONLY D and E !!!
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