When using Kanban as a management tool, the following five principles should be followed: (1) Only when necessary, the subsequent process will receive the necessary number of parts from the previous process; The existing processes and methods need to be completely changed.

⑵ The previous process should only produce enough parts to supplement the parts collected in the next process: under these two principles, the production system is naturally combined into a conveyor belt system, and the production time is balanced.

⑶ Defective products are not sent to the next process: there is no stock in the next process. Once the defective products are found in the post-process, the production must be stopped and the defective products should be sent back to the previous process.

⑷ The number of kanban should be as small as possible: the number of kanban represents the maximum inventory of parts.

5] Kanban should adapt to small-scale demand changes: through market demand and production emergency, according to the number of kanban removed, planned changes will naturally occur.