Geodesic
Fuzzy Versus Probabilistic Benefit/cost Ratio Analysis for Public Work Projects
International Journal of Applied Mathematics and Computer Science, Tome 11 (2001) no. 3, pp. 705-718.

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The benefit/cost (B/C) ratio method is utilized in many government and public work projects to determine if the expected benefits provide an acceptable return on the estimated investment and costs. Many authors have studied probabilistic cash flows in recent years. They introduced some analytical methods which determine the probability distribution function of the net present value and internal rate of return of a series of random discrete cash flows. They considered serially correlated cash flows and the uncertainty of future capital investment and reinvestment rates and they presented some formulae for the B/C ratio for probabilistic cash flows. In the paper, the expected value and the variance of a probabilistic cash flow are obtained by means of moments. Then a probabilistic B/C ratio is given. Fuzzy set theory has the capability of representing vague knowledge and allows mathematical operators and programming to be applied to the fuzzy domain. The theory is primarily concerned with quantifying the vagueness in human thoughts and perceptions. The fuzzy B/C ratios are developed for a single investment project and for multiple projects having equal or different lives.
Keywords: economic justification, risk, fuzzy set theory, B/C ratio
Mots-clés : zbiór rozmyty, ryzyko 
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Kahraman, C. Fuzzy Versus Probabilistic Benefit/cost Ratio Analysis for Public Work Projects. International Journal of Applied Mathematics and Computer Science, Tome 11 (2001) no. 3, pp. 705-718. http://geodesic.mathdoc.fr/item/IJAMCS_2001_11_3_a8/