completion of the orbiting laboratory by 2010

The sequence, including 16-shuttle-flights, foresees launch of the European Columbus Laboratory module on the 7th shuttle flight of the sequence and launch of the Japanese experiment module and associated equipment on the 8th, 9th and 12th shuttle flights. The assembly sequence provides almost a year's cushion for completion of assembly by 2010.
http://www.nasa.gov/mission_pages/station/main/index.html