Ri Hai Thomas Heer Markus Heller Manfred Nagl Ralph Schneider Bernhard Westfechtel René Wörzberger Administration Models and Management Tools. 621-628 2008 Results of the IMPROVE Project http://dx.doi.org/10.1007/978-3-540-70552-9_26 series/lncs/4970 db/series/lncs/lncs4970.html#HaiHHNSWW08