To work against threats and to obtain new possibilities, new forms of inter-organizational collaborations are formed. The management literature deals mainly with one single organization although aspects of collaborative processes are discussed. In this paper problems with inter-organizational management and decision-making are discussed. The conclusion is that some approaches that are successful in single organizations and seem to be promising for inter-organizations need to be further explored, like Warfield�s laws of complexity, systemic models for management and organizational learning.