What are the specific concepts of lean production and logistics operation mode? Please analyze it in detail.

Lean production is a production management mode. Through the changes of system structure, personnel organization, operation mode and market supply and demand, the production system can quickly adapt to the changing needs of users, streamline all useless and redundant things in the production process, and finally achieve the best results in all aspects of production, including market supply and marketing.

Lean production logistics is a kind of logistics management thought originated from Toyota Motor Corporation of Japan. Its core is to pursue a series of specific methods to eliminate all waste including inventory, and develop around this goal. It evolved from the concept of lean production and is the application of lean thinking in logistics management. The workshop uses flexible products such as composite pipes, smooth strips, fast sliding strips and smooth tubes to build production systems. Always embody the concept of continuous improvement and Excellence every day.

Lean logistics needs to pull signals (kanban, equipment, etc.). ) to ensure a balanced production between the various processes of the value stream. For example, retailers, manufacturers and suppliers are connected into a "milk delivery" supply chain through frequent small batch shipments.

As a new production organization mode, the concept of lean production provides new ideas for logistics and supply chain management. It includes the following aspects:

1, customer oriented

It is necessary to determine what creates value and what does not from the customer's point of view, not just from the perspective of enterprises or functional systems.

Step 2 find out the waste

Analyze every link in the value chain, such as product design, manufacturing and ordering, and find out the waste that cannot provide added value.

Step 3 find a way

According to the principle of uninterrupted, no detour, no backflow, no waiting and no waste, make an action plan to create value stream.

Step 4 create value

Create value that is only driven by customers in time.

5. Eliminate waste and pursue perfection

Once the link that causes waste is found, it will be eliminated in time and strive for perfection.

Therefore, as the development of just-in-time management, it is to reduce lead time and improve customer satisfaction by eliminating non-value-added waste in the process of production and supply.

Second, the logistics operation mode under lean production mode

Lean production mode pursues just-in-time system, that is, it only provides the right quantity at the right time. Taking the automobile industry as an example, lean production advocates personalized production of vehicles, driven by meeting customer needs. In the mixed-flow production mode, the production sequence of vehicles is very random. How to deal with the timely supply of thousands of auto parts, logistics plays a connecting role in realizing this management model, which is particularly important.

Logistics concept and logistics system planning are the core content of logistics management, involving production planning, internal logistics, external logistics, parts procurement, supply chain management and other links. Because all this is a pull-type demand relationship, the customer's demand is reflected in the virtual production line through orders and production plans, and the arrangement of vehicles on the production line is reflected in the supply of internal logistics, which in turn drives the supply relationship of external logistics, both vertically and horizontally. Lean production emphasizes that supply chains at all levels need to be highly integrated, with top production organizations as the mainstay, and both production organizations and cost management emphasize the concept of "customer-next process".

Taking the virtual production line as the main supplier of parts and components, and expanding at different levels, there will be four situations in external logistics.

1, synchronous logistics

Synchronous logistics is to provide production instruction information to adjacent suppliers in time during vehicle production, and suppliers provide the models and quantities of required parts on time according to the instructions. These parts usually have some characteristics, such as not suitable for long-distance packaging and transportation, and design changes are easy to occur in production. There are many different options for the same model, so suppliers need to be close to the OEM under natural conditions. Can fully ensure the regularity and timeliness of logistics. Usually, after the production sequence of vehicles is determined on the production line, the information of spare parts will be sent out in the form of production instructions, and the adjacent suppliers will prepare spare parts according to the production sequence and send them to the production line on time. This model needs to plan the whole parts system in the early stage of planning, which is an effective use of industrial cluster effect.

2. Circular logistics?

Circular logistics is a set of logistics mode designed for suppliers who are close to each other but cannot meet the requirements of synchronous logistics. In the process of implementation, the prerequisite is that in order to meet the requirements of lean production mode, the production sequence and production plan can be changed more flexibly. Based on the possibility of virtual production line change, it is necessary to adopt the logistics mode with as few batches and multiple frequencies as possible, and the overall order quantity and specifications are determined according to the parts developed by virtual production line. On this basis, combined with the characteristics of external parts suppliers, we should adopt the method of encirclement to load as much as possible, improve the transshipment rate and reduce the logistics cost.

3. Relay logistics?

The difference between relay logistics and circular logistics lies in the adoption of relay logistics. Due to the different distance environment of parts suppliers, the mode of small batch determines the need to concentrate first and then transport. Generally, it is necessary to comprehensively consider various factors that cause cost changes according to the actual situation, select appropriate relay, main route and secondary route, and determine the order quantity and time with the help of the extension of virtual production line.

4. External adjustment mode

Generally speaking, under the trend of globalization, due to various factors, such as the different division of labor in the automobile industry, technological progress, etc., the procurement channels of automobile parts are diversified, and some parts will be transported abroad. In this mode of spare parts logistics, we need to consider the procurement cycle, and generally need a certain amount of inventory as a guarantee. In addition to the virtual production line as the benchmark, capacity, monthly plan and medium-and long-term plan are usually considered, and the economic order quantity and order time need to be determined comprehensively.

Then, what kind of logistics form should all kinds of parts be sent to the production line after they are concentrated in the main engine factory in batches according to the specified quantity and time? The mode of schedule absorption should be adopted, that is, how many cars are produced on the production line, how many parts are added, so as to ensure the timely supply of parts with the required specifications and quantities, and set up areas corresponding to special parts. Then the parts sent to the corresponding area by the progress absorption chain are sorted according to the specifications of each car, and then sent to the production line for assembly. Tianxingjian Consulting pointed out that in this way, it is reflected in external logistics, forming a lean production logistics system, and the warehouse is invisible, effectively reducing and controlling inventory. Production operates completely in an organic whole, and suppliers are also transferred to it.