Theory group This is an initial Web page of the Theory Group of IGLC. The structuring of this Group's activities is underway. Those interested, please contact Glenn Ballard, Sven Bertelsen or Lauri Koskela. To start, we have three short essays by Sven, titled Complexity,   Construction Industry Model and Concurrent Engineering. Please, send any comments or further contributions to the Webmaster. January, 2002 Webmaster