
Accession Number : AD0745404
Title : A Method for Combining Asymmetric ThreeValue Predictions of Time or Cost,
Corporate Author : RESEARCH ANALYSIS CORP MCLEAN VA
Personal Author(s) : Sutherland,William H.
Report Date : JUL 1972
Pagination or Media Count : 45
Abstract : A method is shown for readily finding the sum or product of Weibull distributions corresponding to threevalue predictions of time or cost. The predictions must each be in the threevalue form: a most likely value falling between high and low values having specified probabilities of occurrence. The first, second, and third moments of each Weibull distributions are found suing dimensionless graphs entered with an 'asymmetry quotient' found arithmetically from the original prediction values. Then the moments of the individual distributions are combined to find the three moments of the overall distribution. If desired, these combined moments can be converted to the threevalue form of the original estimatesa low, most likely, and high figure. (Author)
Descriptors : (*MANAGEMENT PLANNING AND CONTROL, *STATISTICAL ANALYSIS), PROBABILITY DENSITY FUNCTIONS, RANDOM VARIABLES, REGRESSION ANALYSIS, MONTE CARLO METHOD, COMPUTER PROGRAMMING, APPROXIMATION(MATHEMATICS), STATISTICAL DISTRIBUTIONS, PROBABILITY DENSITY FUNCTIONS, MATHEMATICAL PREDICTION, COSTS
Subject Categories : Administration and Management
Statistics and Probability
Distribution Statement : APPROVED FOR PUBLIC RELEASE