• L. Hagge, N. Bergel, A. Herz, J. Kreutzkamp, S. Sühl, N. Welle
  DESY, Hamburg

In most sub-systems of the European XFEL, more than one institute participates in the design & development activities. This is the case for e.g. the cold linac, cryogenics, bunch compressors, undulators and photon beam systems. To ensure interface compatibility and make sure components fit into their complex environments, the collaborating institutes have to create high-level 3D models of their sub-systems. These 3D models are centrally integrated into a master model, which enables identification and elimination of collisions and non-conformities prior to manufacturing. A "collaborative design process", which supports efficient, interactive and inter-disciplinary cooperation of different institutes, has been successfully developed and established at the European XFEL. It consists of design guidelines and processes definitions for information & data exchange, reviews, approvals and change management. The process is supported by the DESY Engineering Data Management System, DESY EDMS, and allows the combination of 3D models from multiple 3D CAD systems. Following the good experience at the European XFEL, the same process is now established at the Global Design Effort for the ILC.