1. A computer-implemented method of evaluating a loan application, comprising: generating, using one or more data processors, a borrower contour map, wherein the borrow contour map identifies a borrower score for each of a plurality of different combinations of borrower attributes, and wherein the borrower attributes include a character attribute, a capacity attribute, and a capital attribute; generating, using the one or more data processors, a transaction contour map, wherein the transaction contour map identifies a transaction score for each of a plurality of different combinations of transaction attributes, and wherein the transaction attributes include the borrower attributes, a collateral attribute, and a conditions attribute; performing, using the one or more data processors, a simulation corresponding to future economic conditions, wherein the simulation predicts performance of loans, and wherein the loans are associated with different borrower score-transaction score combinations; generating, using the one or more data processors, a loan decision model using the predicted performances, wherein the loan decision model associates an action with each borrower score-transaction score combination; receiving, using the one or more data processors, a loan application that includes one or more ratings for the borrower attributes and the transaction attributes; assigning, using the one or more data processors, an application borrower score to the loan application using the borrower contour map and the borrower attribute ratings; assigning, using the one or more data processors, an application transaction score to the loan application using the transaction contour map and the transaction attribute ratings; and determining, using the one or more data processors, an action for the loan application using the loan decision model, the application borrower score, and the application transaction score.