Titlebook: Building Economics: Theory and Practice; Rosalie T. Ruegg,Harold E. Marshall Book 1990 Springer Science+Business Media New York 1990 Termi

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Life-Cycle Cost (LCC)hod is used to evaluate alternatives which compete primarily on the basis of costs. Thus target performance standards are defined, and only candidates which meet the standards are considered. The LCC associated with each candidate is computed, and the candidate with the lowest LCC is the cost-effect

違抗

Net Benefits (NB) and Net Savings (NS)es the amount of net benefits from investing in a candidate project instead of investing in the foregone opportunity. NB is computed by subtracting the time-adjusted costs of an investment from its time-adjusted benefits. If NB is positive, the investment is economic; if it is zero, the investment i

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Benefit-to-Cost Ratio (BCR) and Savings-to-Investment Ratio (SIR)vestment costs, divided by investment costs.. The SIR is savings divided by investment costs. The SIR is the BCR method recast to fit the situation where an investment’s primary advantage is lower costs. SIR is to BCR what NS is to NB.

禁止

Internal Rate-of-Return (IRR)certain the economic attractiveness of the investment. If the IRR exceeds the MARR, the investment is economic. If it is less than the MARR, the investment is uneconomic. If the IRR equals the MARR, the investment’s benefits or savings just equal its costs.

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Selecting a Discount Rate or MARRcause it affects whether a project will be accepted or rejected and how much will be spent on it, the value of the discount rate is a key ingredient in an economic evaluation. If it is set too high, some projects which are economic will be rejected; if too low, some projects which are uneconomic wil