This chapter shows how cross-enterprise processes can be planned, implemented and controlled. The life-cycle-model is a fusion of classic phase-models with lifecycle-models of virtual enterprises. The resulting dynamic model is consistent with the structure-oriented architecture of Collaborative Business Process Management and follows the classification of the view model into global and local knowledge. The generic methods developed herein will enable ACE enterprises to seamlessly integrate partners, building owners and subcontractors in collaboration scenarios on the technology but especially on the conceptual level. The architecture is based on the differentiation of global knowledge within the network and local knowledge of each participating company. Global and local knowledge merge gradually in the step-by-step development of Business process engineering. The main concern of process visualization is to achieve a common understanding of collaborative processes among all persons involved in the business process.