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MES systems provide computerized control of manufacturing processes. In this regard they are similar to SCADA and DCS systems (see the FAQ on SCADA and Controls). MES systems tend to provide the "middle ground" between lower-level SCADA operations (which tend to be more limited to individual machines or manufacturing lines) and plant-wide DCS systems (which tend to provide all-encompassing control of a very large manufacturing system or an entire plant). MES systems' popularity stems from the application's focus on providing information about plant utilization and efficiency. Through a combination of historical data collection, real-time operations and operator inputs, MES systems deliver information about manufacturing efficiency, use of raw materials, product yields, operator efficiency, down/idle time and other parameters that help streamline plant operations.
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