Five independent projects were ranked in decreas­ing order by two measures—rate of return (ROR) and present worth (PW)—to determine which should be funded with the total initial investment not to exceed $30 million. (a) Use the results below to determine the opportunity cost in ROR terms for each measure. (b) If a MARR of 15% per year is a firm requirement, how does the opportu­nity cost help in selecting projects to fund?

What will be an ideal response?


(a) ROR measure: Select projects A, E and C to total $21 million. Opportunity cost is 12.8%, the ROR of project B

PW measure: Select projects A, E, C and D to total $29 million. Opportunity cost is 12.8%, the ROR of project B

(b) Since 12.8% is less than a MARR of 15%, any project with ROR < 15% should be
eliminated initially. Projects B and D should not be considered.

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