A method for ranking relative risk of a plurality of transactions, wherein each of the transactions has associated therewith a plurality of variables. In one embodiment the method includes assigning a value to each of the variables associated with each of the transactions, aggregating the values assigned to each of the variables on a transaction by transaction basis to produce an aggregate risk level for each transaction, and ranking each of the transactions relative to one another based upon the aggregate risk level corresponding to each transaction. A corresponding software program and system are also disclosed.