Abstract: A computer-implemented fraud detection system comprises a processor and memory storing computer-readable instructions for causing a computer to perform a method for determining potentially fraudulent records. The method performed by the computer comprises executing a trial fraud detection strategy routine on historic records in a database, the trial detection strategy comprising multiple rules including at least one weighting factor. The method further includes calculating an efficiency of the trial fraud detection strategy based on the multiple rules and executing an iterative routine to optimize adjusting the at least one weighting factor. An adjusted fraud detection strategy that incorporates the adjusted weighting factor is set.

Abstract: A method of determining potentially fraudulent records in a database comprises defining a detection strategy. The detection strategy is targeted to detect existing records from the database and comprises multiple inputs. The detection strategy is executed on existing records and results are displayed for review by a user. The detection strategy is then dynamically calibrated as desired based on input received from the user, and any modified results are displayed. A calibrated detection strategy is set, and then it is executed on new records to detect potentially fraudulent records warranting investigation. A computer system having a processor and memory storing instructions for performing such methods is also described. A computer readable storage medium having computer-executable instructions for performing such methods is also described.