What are pull production mode and push production mode?

Pull production mode: refers to how many products are processed according to the needs of the latter process, and the parts just needed need to be manufactured in the previous process.

Push production mode: refers to the production of each department according to the production plan specified by the company according to the calculation logic of MRP. The last procedure is not responsible for the next procedure, and the product can be delivered to the next procedure as planned after production. This method is called push production.

Characteristics of pull production mode:

The so-called demand-driven production mode means that under the condition of storing a certain number of finished products and in-process products, each working procedure is pulled from back to front layer by layer according to the demand, and the required products are provided on time and in quantity.

Demand-driven production mode is guided by lean thinking, but based on the reality of state-owned enterprises, it is allowed to establish a small amount of safety stocks and WIP reserves, and the quality control reaches the standard of 3 horses. Demand-driven production is the primary stage of lean production. It is the only way for domestic automobile manufacturing enterprises to implement lean production by promoting continuous improvement in all aspects of enterprises.

Demand-driven production takes just-in-time production as the core and aims at reducing costs, continuous improvement and improvement. Through the realization of demand-driven organization mode, we can gradually eliminate ineffective production, compress inventory reserves, reduce production costs, meet the changes of market demand more timely and effectively, continuously improve and perfect the system operation mode, and gradually meet the requirements of lean production.

Characteristics of push production mode:

In the push system, each process is independent of each other, and the inventory of WIP is large.

Traditionally, enterprises generally adopt push production system. According to the market demand, the planning department decomposes the production of the final product and communicates the corresponding production tasks and lead times to various production departments. Finally, it is refined into the input-output plan of each component and the corresponding ordering plan.

For each department, it is necessary to organize production according to the plan, report the actual completion to the planning department after production, and send the finished product to the next production department in the process.

Overall production is a "push" process from the initial production department to the final production department. However, the push production mode does not meet the requirements of JIT production mode (zero inventory). Judging from the just-in-time production mode, the push production mode will produce a lot of "waste".