Engineering Economics
What is normally used to compare alternatives that accomplish the same purpose but have unequal lives?

Annual cost method
Present worth method
MARR
Capitalized cost method

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Engineering Economics
Pick up the correct reason for making conceptual (or preliminary) estimate from the following:

All of these
To check quotations from contractors and/or sub-contractors
To compute target estimate for the owner while drawing and specifications are in initial stage
To have a check on a definitive cost estimate

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