MES unifies manufacturing and planning. Management information systems represented by MRP
II and ERP, as well as automation technologies represented by CNC machining, DNC systems and flexible manufacturing, It has been widely used in the manufacturing industry. Although the promotion of these two types of systems has achieved certain results, effective cooperation between the two has been ignored, resulting in a lack of effective real-time information support for upper-level corporate plans and a lack of optimized scheduling and coordination in lower-level control links. If the planning layer and the workshop execution layer cannot have good two-way information flow interaction, it will be difficult for the enterprise to respond in real time. MES, which was born more than ten years ago, directly addresses this problem and has been widely promoted in developed countries. In our country, the understanding and application of MES are still in their infancy. MES is oriented to the workshop level of manufacturing enterprises and can provide real-time data on the production site to other enterprise application systems (such as ERP and SFC), thereby strengthening communication between planning management and underlying control.
Connecting the past with the next: The key to the "location" of MES is the manufacturing workshop of an enterprise, which is the intersection of logistics and information flow, and it is here that the economic benefits of the enterprise are finally materialized. With the improvement of the market economy, workshops have gradually transitioned to branch factories in manufacturing enterprises, which has led to the transformation of their roles from traditional corporate cost centers to profit centers, which has further strengthened the role of workshops. Therefore, the manufacturing execution system MES, which is located in the workshop and plays an execution function, plays a very important role. The grasp and feedback of real-time information in the workshop is the guarantee of the normal operation of the upper-level planning system by the manufacturing execution system. The production management of the workshop is the fundamental task of the manufacturing execution system, and the support of the underlying control is the characteristic of the manufacturing execution system. Interoperability: MES is closely related to other systems. As a manufacturing-oriented system, MES must have a close relationship with other production management systems of the enterprise. MES plays the role of information hub (Information
Hub). It is equivalent to a communication tool that provides real-time data on the production site to other application systems. For example, the enterprise resource planning (ERP) system requires real-time production data such as costs, manufacturing cycles, and expected output times provided by MES; the supply chain management (SCM) system obtains the current order status, current production capacity, and enterprise information from MES. The mutual constraints of production shifts, etc. On the other hand, MES also needs to obtain relevant data from other management systems to ensure the normal operation of MES itself. For example, the data for production scheduling in MES comes from ERP planning data; the timing of production activities in MES needs to be based on the master plan and scheduling control in the supply chain (SCM) system; PDM provides MES with actual production process documents and Various recipes and operating parameters; real-time production status data fed back from the control module are used by MES to evaluate actual production performance and judge operating conditions. The American Gallup MES system has more than 20 years of global technology accumulation and experience accumulation, and nearly 15 years of project implementation experience in China. It is suitable for all major manufacturing industries and has a large number of successful cases. More than 80 users are among the world's top 500 companies. Efficient integration and application with other enterprise information systems, especially in aerospace, military industry, weapons industry, electronic technology, equipment manufacturing, machine tool industry, automobile industry, medical equipment, mold industry, metal processing and other fields, it has occupied a far leading position .