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Finding the multi-variate function, f

Rating parametric methods


Based on multi-variate mathematics:

Y = f( x1, x2, x3, .....xn)

Where Y is the cost-to-complete, and x1, x2, x3, .....xn are parameters that are assumed to have a cost impact of some sort, and their value is known at the time of the estimate.

The function f is not known.

History of somewhat similar k cases does exist, and for which one knows:

Yi = f( x1i, x2i, x3i, .....xni)

Where i=1,2,...k.

Yi is the cost to complete project i, when the value of parameters xj was xji .

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