A method of output management of processing in a manufacturing plant with a plurality of stages during a running period. The method begins with the step of determining the stage In Flow of Work In Process (WIP) in the plant, determining the Out Flow of WIP in the plant, and calculating Flow ...http://www.google.com.hk/patents/US5748478?utm_source=gb-gplus-share專利 US5748478 - Output management of processing in a manufacturing plant