R.L. HO, E.L. JOHNSON AND T.L. SHAW Georgia Institute of Technology (Atlanta, Georgia, USA UWE H. SUHL AND LEENA M. SUHL Freie Universität, Berlin and Universität-GH Paderborn (Germany) FEDERICO MALUCELLI, MADDALENA NONATO AND STEFANO PALLOTTINOIstituto di Elettronica, Università di Perugia (Italy) RICHARD LAUNDY DASH Associates (Royal Leamington Spa, UK) MICHAEL P. HAYDOCK AND ERIC BIBELNIEKS IBM, Global Business Intelligence Solutions (Minneapoli, Minnesota, USA) TITO A. CIRIANI, STEFANO GLIOZZI AND MARINA RUSSO IBM, Global Business Intelligence Solutions, Rome and Pisa (Italy) JOSEF KALLRATH BASF-AG (Ludwigshafen, Germany) and University of Florida (Gainesville, USA) SERGIO BARBARIOL, MAURO LUSETTI, MARCO MANTILLI AND MAURO SCARIONI AGIP Petroli, Raffineria di Livorno and IBM Italia, Milan (Italy) LARRY HAVERLY Haverly Systems Inc. (Ventura, California, USA) TURAJ TAHMASSEBI Unilever Research (Port Sunlight, Bebington, Wirral, UK) ROBERTO TADEI, FEDERICO DELLA CROCE AND SALVATORE PUCCI Politecnico di Torino and MRP Consulting (Torino, Italy) JAVAD AHMADI, ROBERT BENSON AND DANIEL SUPERNAW-ISSEN Advanced Micro Devices (Austin, Texas, USA) GIORGIO FASANO Alenia Aerospazio, Space Division, Turin Plant (Italy) JACQUES GHEURY AND THOMAS LEKANE Tractebel energy engineering (Brussels, Belgium) SAMER TAKRITI IBM, Thomas J. Watson Research Center (Yorktown Heights, NY, USA).