director of operations at Ontariobased Zomax Canada co., observes that lean manufacturing is all about identifying fat in a process and cutting it out.As an example, he notes that a setup for an electronics board may require three hours, but customers do not want to pay for the time that the equipment is down-they only want to pay for what's on the board.Thus, reducing lengthy changeover times is a key part of improving flow,reducing inventories,and reducing batch size.