A Bayesian risk methodology is outlined for making decisions under unc
ertainty. A practical example is given for a crop insurance where the
insurer decides how to take risks. The insurer's objective is formulat
ed as a goal function whose expected value must equal zero. Risk to th
e insurer arises from the uncertainty and variation in the input varia
bles of a previously developed deterministic yield model. Monte Carlo
simulation provides a cumulative frequency histogram of the goal funct
ion from which risks are calculated. The methodology is general and ca
n be used in many situations to determine the risk in a project from u
ncertain inputs.