The MoU4 defines the governance of the ALADIN Consortium for 5 years from December 15, 2010. It was signed on the 15^th of December 2010 by the representatives of the 16 ALADIN Partners during the 15^th General Assembly in Prague.

The evolution of the content from MoU3 is mainly a better balancing within the management entities (LTMs more active in planning and reporting, CSSI more involved in applications) and the harmonisation with HIRLAM, including the possibility to temporarily and jointly activate “task-forces†.