Due to an increase of demand for hydraulic excavators outside Japan, Sumitomo Construction Machinery Co., Ltd. set up a factory in China (Tangshan city, Hebei province) in 2009, in Indonesia (Jawa Barat, Karawang) in 2011. Along with a factory in Japan (Chiba), these factories produce and supply hydraulic excavators meeting every country’s needs in a global market. Sumitomo Construction Machinery Co., Ltd. works on building a product quality control system globally in order to deliver top-quality "Monozukuri".
QC (Quality Control) Circle Activities started in 1982 and later developed to TQC (Total Quality Control) then to TQM（Total Quality Management）. From 2002, it evolved to CS (Customer Satisfaction) Activities.
Corporate Officer of Manufacturing Division at Sumitomo Construction Machinery, Co., Ltd. Iwata Shuji explains, "We named it ‘CS Activities’ because we believe the purpose of quality control is to satisfy customers. At the same time, we adopted a statistical quality control technique called "Six Sigma Activities" to operate on two wheel concept with CS activities, findings and elaboration from the field, and skill upgrade".