Given all the attention to interoperability within the AEC industry over the last ten years you would have thought Airbus would have had a handle on the idea. Unfortunately it would appear that even though they are using Catia for the bulk of their design development work the significant format differences between version 4 and 5 plus management mishandling has resulted in the delay of the A380 and millions (if not billions) of dollars of losses. It would appear that even though Boeing's aircraft may not be as imagination inspiring as the A380 their CAD processes are a lot sounder.