This paper introduces and evaluates the effectiveness of a new visualization method that helps to communicate a complex business process in an organization. A quality development process needed to be established in an education centre for health care professions. Traditional project plans, flyers and mails did not manage to get the attention, present an overview and details and motivate the employees for action. Because visual metaphors are effective for knowledge communication, we developed a customized tube map visualization that illustrates the whole process: Each tube line represents a target group, each station a milestone. The visualization was printed as a poster and located at prominent locations in the organization. The evaluation showed that the tube map visualization is a powerful metaphor to communicate a complex project to different target groups and build up a mutual story. The employees considered it useful because it provides an overview and detailed information in one image and initiates discussions.