MES is an information technology system that manages the production sequence and manufacturing operations in factories
Over the years, international standards and models (ISA 95 and B2MML) have refined the scope of such systems in terms of activities, which typically include:
1.1 Management of product definitions
This application includes the areas of storage, version control (productio batch) and exchange with other master data systems such as production rules, bill of materials, bill of resources, process set points and recipe data, which define the manufacturing process.
1.2 Management of production materials
This application includes data recording, data exchange and the analysis of information about production materials used to prepare and execute production orders with the available and suitable production materials.
1.3 Scheduling (production processes)
This applications determine the production schedule as a collection of work orders to meet the production requirements, typically received from ERP to make optimal use of local resources.
1.4 Dispatching production orders
Depending on the type of production processes, this also includes the further distribution of batches, runs and work orders in conjuction with the allocation to work centers and the adjustment to unforeseeable circumstances.
1.5 Execution of production orders
Although actual execution is done by process control systems, an MES may perform checks on resources and inform other systems about the progress of production processes.
1.6 Collection of production data
This includes the collection, storage and exchange of process data, equipment statuses, material stock information and production logs in either a data history or a relational database.
1.7 Production performance analysis
Creation of useful information from the raw data collected about the current status of production, such as Work In Progress (WIP) overviews, the production performance of the past period and the Overall Equipment Effectiveness or any other key performance indicators.
1.8 Production track and trace
Registration and retrieval of related information in order to present a complete history of quantities, orders or equipment (particularly to comply with legal regulations).