A Manufacturing Execution System (MES) is system that companies can use to measure and control production activities with the aim of increasing productivity and improving quality.
A Manufacturing Execution System MES is a shop floor control system which includes either manual or automatic labor and production reporting as well as on-line inquiries and links to tasks that take place on the production floor. MES includes links to work orders, receipt of goods, shipping, quality control, maintenance, scheduling, and other related tasks.
The ISA has defined standards regarding the structuring of MES and its integration in a larger company-wide IT architecture. ISA-95 "Enterprise-Control System Integration" defines a layer model looking at the integration aspects between ERP, MES and the production control level. It is supported by several vendors in the MES area. ISA-S88 "General and Site Recipe Models and Representation" defines a process state model for the batch industry.