CONSIDERING PRODUCTION UNCERTAINTY IN BLOCK LAYOUT DESIGN Bryan A. Norman Department of Industrial Engineering University of Pittsburgh 1048 Benedum Hall Pittsburgh, PA 15261 banorman@engrng.pitt.edu 412-624-9830 412-624-9831 (fax) Alice E. Smith Department of Industrial and Systems Engineering Auburn University 206 Dunstan Hall Auburn University, AL 36849-5346 aesmith@eng.auburn.edu 334-844-1400 334-844-1381 (fax) Submitted to European Journal of Operational Research July 1999