Creativity in work life typically includes several people, thus there is a need to understand how people interact and support each other in creative group processes. Is there, for example, a need for a structure of the work process of a creative group? This paper is about the possibility to enable self-organisation and if an attempt to do so can increase group creativity. In the experiment of this study half of the groups were given a work process structured to enable self-organisation. The degree of self-organisation was measured with a questionnaire and the idea flow was observed and analysed. Ideas were significantly more often observed and used by other group members in the more self-organised groups, and the two best solutions of the task were find among them. A work process structured according to the six delta model seems to increase self-organization as well as creativity of a group.