A metal plating company is considering four different methods for recovering
byproduct heavy metals from a manufacturing site’s liquid waste. The investment
costs and incomes associated with each method have been estimated as shown
below. All methods have an 8-year life. The MARR is 11% per year. You can use
Excel to solve any iterative formula, but explain your solution method on paper.
(8.28)
(a) If the methods are independent, because they can be implemented at different
plants, which ones are acceptable?
(b) If the methods are mutually exclusive, determine which one method should be
selected, using a ROR evaluation.
