Cooperation between humans is supported by means of workflow management systems and groupware tools, whereas support for agents mainly consists in standardising agent communication languages and developing co-operation protocols. Most of these mechanisms are designed for special situations. Thus, they do not take into account that characteristics of environment, work, persons and agents can change and that relations between dif-ferent cooperations exist. In the following, an innovative cooperation model and platform is introduced. An ex-tended concept of roles and structured communication cares for integration of humans and agents and increases flexibility. Our approach enables to change the organisational structure without the need to restructure the coop-eration protocols and vice versa.