That is to say, only one workpiece is flowing in each process, so that the processing process from blank to finished product is always in a state of non-stagnation, non-stacking and non-overtaking. It is a production management method in which the process is challenged to zero in the process. The idea is Improved type. Through the pursuit of "one stream", various problems, wastes and contradictions are made apparent, forcing people to take the initiative to solve various problems existing at the scene, and to achieve the best use of talents, make the best use of them, and do their best.

A flow requires the site to be the management center, implement the three-presentism (on-site, current, current policy), establish firefighting (on-site station, fault listing, equipment timeless maintenance, maintenance tool management) and fire protection system, forming 5S (finishing The civilized production environment of rectification, cleaning, cleaning and literacy creates environment and conditions for improving quality, reducing costs and guaranteeing delivery time. On-site management should shift from equipment-centric to people-centered, from single-machine operation to synchronous production, and turn turbidity into clear flow. Logistics design should adhere to: continuous flow principle; standardized loading principle; simple transportation principle; fast conveying speed; easy to collect scraps and easy to manage principles.