For successful ergonomics intervention the ergonomist should become a catalyst of change leading the expert role. Human Interactive Methods (HIM) are characterized by having the 'problem owners' become committed to actively dealing with the problems. HIM is part of a wider theoretical framework 'The Dramaturgy of Work Life' (DWL) in which Transfer of Knowledge becomes a key issue. The design process can be described as a play where different actors create different roles. The rules of the play have to be adapted to the language of the user. Otherwise it is inadequate to speak of Participative Ergonomics. Examples from industry, service, health care, education and culture enterprises illustrate the application of DWL and HIM.