Now our enterprise management system gradually upgrading, made a great contribution to the enterprise in management, marketing, development, and operational aspects. However, because of the domestic MES system started late, wide field of application, have different functions. Enterprises are facing increasingly fierce competition to win the market must be to strengthen management by implementing MRPII / ERP. However, the upper management of production planning affected by the market is growing, clearly felt that plans keep up with changes. So MES system has an important significance in production management systems.
Customer-facing stringent requirements on delivery time, face more modified products, orders constantly change and business decision makers realize that the development of the plan depends on the market and the actual job execution status, but not entirely material and inventory returns to control production. Meanwhile MRPⅡ / ERP software is mainly for resource planning, these systems are usually able to handle things (historical analysis) occurs before yesterday, and is expected to also handle the event is going to happen tomorrow, but the events taking place today are often left without specification of the gap, and the traditional production site management has been unable to meet today's complex competitive needs. Therefore, identify any issues that affect product quality and cost, improve the timeliness and flexibility programs, while improving the efficiency of the production line has become very concerned about the current every business.
Manufacturing Execution Systems (MES) just to fill this gap. MES system is in the implementation of the plan layer and the layer between the shop floor control system operating SFC, responsible for production management and scheduling execution. It improved by controlling all plant resources including materials, equipment, personnel, processes, instructions and facilities, including manufacturing competitiveness, providing a system integrated on a single platform, functions such as quality control, document management, production scheduling. In order to achieve real-time enterprise of the ERP / MES / SFC system.
MES system provides real-time data to other enterprise management information system. For example, ERP systems MES system provides a cost, manufacturing cycle time and expected outputs real-time production data; SCM obtain the current order status from the MES system, the current production capacity and shift production enterprises mutual constraints; CRM's successful bid price and on-time delivery, depends on real-time data about the production of MES system provides; in the PDM product design information, and so on can be optimized based on the product output and production quality data MES system.
In many plants, the whole plant management functions are still performed by the file system and artificial, usually experienced personnel in charge of the factory production efficiency key. In most runs, the judge artificial system and experienced operating personnel always plays an important role. However, the variety and quantity of products constantly changing market requirements, adjust production by artificial and experience is clearly inefficient, slow response, lack of competitiveness. And artificial systems can not adapt to the product, the increasingly accelerated changes in technology, technical and user requirements. Since such a rapid change in the production run, the timeliness of the information required to react with MES system sec or even minutes, then people probably not alone.
Therefore, effective MES system brings self-evident, ERP / MRP environments based on specific transaction-based data exchange is its production scheduling, transport arrangements or respond to the requirements of the production plan. In contrast, the control of the decision-making must be completed within seconds, even less time, its production process, the operator, or to respond to the operational needs of the material. Obviously, the difference in real-time and real-time response of the environment affects the vast majority of transactions and the specific implementation of the control layer.
Conventional data flow and control flow between the ERP and the control layer there is a huge gap. Traditional information management systems and financial management reports to the general manager in charge of financial affairs of the person in charge, living in management, and traditional engineering production information is general manager responsible for the production of the report, different responsibilities, communication between each other may not be able to do timely and detailed in-depth. In contrast, the material MES system can provide data associated with the production of consumption, while the supplied material can be generated based on the exact time of execution of the advance, which improves the storage control. Accurate production model with actual measurements versus planned schedule closely linked, contribute to the expression of accurate real-time behavior of the production plan.
Today's manufacturers in the growing market competition, feel more and more brutal market and challenges, how to seize opportunities quickly adjust production to meet the needs of the market, increase production efficiency in the existing equipment conditions, do Lean manufacturing is to constantly put in front of business executives a road issue. For example, in the case of market orders and more varieties of the same class vehicle, vehicle business executives are most worried about is the production line to stop the line.
All in all, there is the significance of MES system software business is very large, improve management capacity, improve efficiency and speed up the production schedule and other important significance.
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