In a working contract, the project supplier must achieve a specific project goal. As well as ensuring a project’s actions and documentation, there is a commitment to achieve a predefined goal. In this case, the project outcome, not its actions, is rewarded. Hence, such a project only needs to provide evidence that the specified goal has been achieved rather than reporting on the actions being implemented. If the goal is not achieved, the investors can demand a refund of their payments. Due to stricter requirements and higher risk associated with such a commitment, project suppliers with this type of contract will calculate higher costs.