A Southern Georgia school district is consideringordering 53 propane-fueled school buses. “They’re healthier,they’re cleaner burning, and they’re much quieter than thediesel option,” said a school administrator. Propane-poweredbuses also reduce greenhouse gasses by 22% compared togasoline-powered buses and 6% compared to diesel ones. Butthey come at a premium—$103,000 for a propane model,$15,000 more than the diesel equivalent.The propane bus operating cost (above and beyond fuelcost) is 30 cents/mile, compared to 40 cents for the diesel.Diesel fuel costs about $2/gallon in Georgia, about $1 morethan propane. Bus mileage is 12 mpg for the propane modelvs. 10 mpg for diesel. The life of a school bus in the districtaverages 9 years, and each bus travels an average of 30,000miles per year because the district is so large and rural.Which bus is the better choice based on a life-cycleanalysis?

Practical Management Science
6th Edition
ISBN:9781337406659
Author:WINSTON, Wayne L.
Publisher:WINSTON, Wayne L.
Chapter2: Introduction To Spreadsheet Modeling
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A Southern Georgia school district is considering
ordering 53 propane-fueled school buses. “They’re healthier,
they’re cleaner burning, and they’re much quieter than the
diesel option,” said a school administrator. Propane-powered
buses also reduce greenhouse gasses by 22% compared to
gasoline-powered buses and 6% compared to diesel ones. But
they come at a premium—$103,000 for a propane model,
$15,000 more than the diesel equivalent.
The propane bus operating cost (above and beyond fuel
cost) is 30 cents/mile, compared to 40 cents for the diesel.
Diesel fuel costs about $2/gallon in Georgia, about $1 more
than propane. Bus mileage is 12 mpg for the propane model
vs. 10 mpg for diesel. The life of a school bus in the district
averages 9 years, and each bus travels an average of 30,000
miles per year because the district is so large and rural.
Which bus is the better choice based on a life-cycle
analysis?

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