A probabilistic determination and integral consideration of cost, schedule and risk is the basis for developing an appropriate incentive mechanism for IPA. These elements are linked, simulated and analysed using a digital project risk twin. The results are transparently available to all project partners. Through the set incentive mechanism, the goals of the participants are harmonised and individual risk potentials and dependencies become visible. Based on this, an incentive mechanism has to be designed that ensures a fair pain/gain distribution between the participants.