Conference of the International Federation of Operational Research Societies location:Barcelona (Spain) date:13-18 july 2014
According to the Association of Certified Fraud Examiners, an organization loses on average about 5% of its revenue to occupational fraud. Collusion allows perpetrators to more easily circumvent anti-fraud controls, resulting in a median loss that is twice the loss of a single perpetrator scheme. While collusion remains hard to prove, event logs of process-aware information systems can assist in uncovering highly unusual interaction patterns. Based on the transaction data in the logs, materiality based metrics can be defined for selecting the optimal fraction of potential fraud issues.