Abstract: A computer system for evaluating transactions in a network includes a storage medium, one or more processors coupled to said storage medium, and computer code stored in said storage medium. Computer code, when retrieved from said storage medium and executed by said one or more processor, causes the system to receive a plurality of transactions over the network, and automatically generating rules for evaluating the transactions, using the computer system. Each of the rules includes variables and partition of values of the variables, each partition having an assigned score. The computer system also automatically combining the rule scores to form a final score.