It must not be left to chance how this is done. The joint project efficiency of 17 European groups and 3 NRAO sites and several Chilean sites must certainly be considered. Interface control across so many time zones is an organizational challenge. It is essential that the organizations pledge to work closely with each other and that they develop a cooperative approach, in which all participants help to work out problems as they arise. Some scheme for asserting central management control of the systems engineering is the most important part of this.
Configuration control requires much thought.