Stakeholder management is a special service according to AHO booklet 19. A project always operates in an environment and is shaped by the project participants. The environment and those involved in the project, as well as external influences, must be taken into account during project implementation. Particularly in the case of large-scale projects, it is often criticized that the influences of the project participants (stakeholders) are neglected. Stakeholders of a project are groups or individuals who are affected by this project in some way.