[With problem of applying modern systems theories in clinical practice]

In this paper the tension between "practice" and "theory" is reflected concerning modern system theories and psychosocial practice. Focusing the limits of predictability and manageability these theories contrast with practitioners need for easy-to-use advices for acting. Reframing the well-known dilemma of the discrepancy between theory and practice the usefulness of the difference between theory and practice is accentuated. Others reflected these topic in more fundamental or philosophical way (cf. Krohn & Küppers 1990; Schiepek 1991; Schiepek, Fricke & Kaimer 1992; Willke 1989). In a more "pragmatic turn" attention is drawn to some methods of orientation and intervention in complex systems. System game and system competence are new ways in training and evaluating the management of complex systems.