
81Decision Analysis with Multiple Attributes
on its domain. We do not have a lot of freedom with the exponential func-
tion because it uses only one parameter. It still makes sense to assess x
for different values of probabilities and outcomes because then one can
nd the best-t value of R. We will later show this method with a solved
example. If different assessments give drastically different values of R, a
different functional form should be chosen. Polynomials provide a lot of
exibility in assessing different preference structures at different points in
the utility function, but they should be used only as a last resort because
of inst