Engineer-To-Order (ETO) production planning & control: an empirical framework for machinery-building companies Federico Adrodegari 1 , Andrea Bacchetti 1 , Roberto Pinto 2 , Fabiana Pirola 2 , Massimo Zanardini 1 1 Department of Mechanical and Industrial Engineering, University of Brescia, Brescia, via Branze 38, 25123 (BS) Italy (federico.adrodegari@ing.unibs.it, andrea.bacchetti@ing.unibs.it, massimo.zanardini@ing.unibs.it) 2 CELS - Department of Management, Information and Production Engineering, University of Bergamo, Viale Marconi 5, 24044 Dalmine (BG) Italy (roberto.pinto@unibg.it, fabiana.pirola@unibg.it)