Toyota logistics recruitment

The basic idea of JIT production mode is to produce the required products according to the required quantity only when needed, that is, to pursue a production system with no inventory or minimum inventory. The basic idea of JIT is the planning and control of production and the management of inventory.

JIT production mode takes just-in-time production as the starting point, first exposes waste such as overproduction, and then eliminates and adjusts equipment and personnel, so as to reduce costs, simplify plans and improve control. In the field control technology, the basic principle of JIT is to produce the right number of parts or products at the right time, that is, just-in-time production. It changes the previous process in the traditional production process into the latter process, and changes the latter process into taking goods from the former process according to Kanban. Kanban system is the core of JIT production control technology, but JIT is not just kanban management.

The goal of JIT is to completely eliminate ineffective labor and waste, specifically to achieve the following goals:

1. Minimum waste (zero waste). JIT requires to eliminate all kinds of unreasonable reasons, and every working procedure in the processing process requires to reach the best level.

2. The lowest inventory (zero inventory). JIT believes that inventory is the proof of unreasonable design of production system, uncoordinated production process and poor production operation.

3. The shortest preparation time (zero preparation time). The length of preparation time is related to batch selection. If the preparation time tends to zero and the preparation cost tends to zero, it is possible to adopt a very small batch.

4. The production lead time is the shortest. The system combines short production lead time with small batch, and has strong adaptability and flexibility.

5. Reduce the handling of parts, and the handling capacity is low. Parts feeding and processing are non-value-added operations. If the transportation quantity and processing time of parts and components can be reduced, the assembly time can be saved and the possible problems in assembly can be reduced.

6. Low machine damage.

7. Small batch.

In order to achieve the above objectives, JIT's main principles for product and production system design are as follows:

1. In the era of greatly shortened product life cycle, product design should be consistent with market demand. In product design, it is necessary to consider the convenience of production after product design.

2. Try to use group technology and process production.

3. Establish contact with suppliers of raw materials or purchased parts to achieve the purpose of JIT supplying raw materials and purchased parts.

In JIT mode, we try to make products easy to produce and assemble through reasonable design. When the product range is expanded, even if it cannot be reduced, we should try not to increase the working procedures. The specific methods are: (1) modular design; (2) The designed products should use universal parts and standard parts as much as possible; (3) The design should consider the easy realization of production automation.

One of the foundations of JIT is balanced production, that is, the average production of products, which makes the logistics flow in a balanced and balanced way among operations, production lines, processes and factories. In order to achieve balance, JIT adopts monthly plan and daily plan, and adjusts the plan in time according to the change of demand.

JIT advocates the adoption of specialized layout of objects to reduce queuing time, transportation time and preparation time, and adopts specialized layout based on objects at the factory level to make each batch of workpieces flow smoothly in each operation room and workshop and reduce the passing time. Adopting the specialized layout of micro-objects and the layout of work center at the assembly line and work center level can reduce the delivery time.

JIT can make rational use of production resources, including labor flexibility and equipment flexibility. When the market demand fluctuates, the labor resources are required to be adjusted accordingly. If the demand does not increase much, it can be completed by properly adjusting the operation of operators with various skills; When demand decreases, we can reduce production shifts, fire temporary workers, and assign redundant operators to participate in equipment maintenance and repair. This is the meaning of labor elasticity; The flexibility of equipment refers to the consideration of processing problems in product design and the development of multifunctional equipment.

JIT emphasizes total quality management, and its goal is to eliminate nonconforming products, eliminate the root causes that may cause nonconforming products, and strive to solve problems. JIT also contains many factors that are conducive to improving quality, such as small batch, rapid transfer of parts to the next process, and early detection of quality problems.

JIT production management mode was introduced to China from Japan in the late 1970s, and Changchun No.1 Automobile Factory began to apply Kanban system to control production site operations. By 1982, the number of parts picked up by the first automobile factory through kanban has reached 43% of the total number of parts produced by it. In the early 1980s, China Enterprise Management Association organized the popularization of modern management science. As one of the modern management sciences, Kanban management was popularized nationwide and adopted by many enterprises.

In recent years, in China's automobile industry; The application of JIT in electronic industry, manufacturing industry and other enterprises that implement assembly line production has achieved remarkable results. For example, the first automobile factory, the second automobile factory, Shanghai Volkswagen Co., Ltd. and other enterprises creatively applied JIT in combination with the factory situation, and gained rich experience and created good economic benefits.

JIT is order-driven, which closely links supply, production and sales through kanban, greatly reducing material reserve, cost inventory and work in process and improving production efficiency. In the process of popularization and application, this production mode has been continuously developed and improved, which has inserted wings for the rapid development of Japanese automobile industry and improved production efficiency. This mode of production has also attracted the attention of the world industry and is considered as one of the most ideal and vital new production systems in today's manufacturing industry.