The application software for factory execution systems is called MES system software. MES is designed for particular applications and includes a wide range of features. For ease of explanation, the MES application software is often broken down into four main components: database server, MES server, client application, and device drivers. The database used to store data from the equipment and production is kept on the database server. The MES server is located on the plant's computers. It gathers information from the servers and other devices and communicates with them by sending status queries for things like equipment control. The client application, which typically consists of a database management system or MES application software, enables users to perform database queries, keep databases up to date,
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