
128 Probability Methods for Cost Uncertainty Analysis
Hint: Solve for a and b from a simultaneous equation that involves
the transformation y = (x − a)/(b − a).Note that P(Y ≤ y
i
) = i =
P(X ≤ x
i
) and P(Y ≤ y
j
) = j = P(X ≤ x
j
), in the context of Case 1
(Section 4.5).
References
Abramson, R. L. and P. H. Young. 1997 (Spring). FRISKEM–Formal Risk Evaluation
Methodology. The Journal of Cost Analysis, 14(1), 29–38.
Evans, M., N. Hastings, and B. Peacock. 1993. Statistical Distributions, 2nd edn. New
York: John Wiley & Sons, Inc.
Garvey, P. R. 1996 (Spring). Modeling cost and schedule uncertainties—A work
breakdown ...