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The purpose of this research isto make improve productivity through process improvement without expensive capital investment in a small scale mold manufacturer. The target company which is selling sand mold casting products employs many foreigners, and 50% of factory workers worked by the periphery of a specific manufacturing sector were difficult to communicate smoothly on site. Also, the company has the customized production method which production and delivery time are constant each month. However, the company's situation is getting harder since the order volume of existing suppliers has decreased and profit has reduced. So, we decided that the company needs new customers and overseas markets in the long run but to improve the process without facility investment in the short term is important task. We improved the process, created the standard of work for foreign workers, and improved the working environment by eliminating the on-site risk factors that the staff could not perceive. The results were as follows. The productivity has improved by 1.5 times. Training by work standards has shortened the OJT time of new workers and efficient working methods have become standard. Improvement of the work environment has improved the job satisfaction of workers and enabled long-term service of workers in the mold industry where labor shortage is serious.
