One day, the factory director Korea Precision Machinery Company implemented this unique management system, that is, let employees take turns to be factory directors and manage factory affairs. The factory director, like a real factory director, has the power to handle official business. When the factory director criticizes the workers, he should record it in detail in the work diary for the employees of all departments to see. The supervisors of all departments and workshops can inspect the work at any time according to the criticism. After the implementation of the "one-day factory director system" in this factory, most employees who have been "factory directors" have strengthened the centripetal force of the factory. Remarkable achievements have been made in factory management. In the first year, it saved more than $3 million in production costs.