FUJITSU.56, 6, p.605-613 (11,2005) 605 Innovation in Software Development Process by Introducting Toyota Production System 56, 6, 11,2005 PST 2003 TPS TPS IT TPS PST TPS PST PST Abstract Fujitsu Software Technologies [formerly Fujitsu Prime Software Technologies (PST)] has been conducting activities to improve productivity modeled on the Toyota Production System (TPS) since 2003. An agile developm