What is MES (Manufacturing Execution System)?
MES stands for Manufacturing Execution System. It is software that drives, monitors and optimises the execution of production processes in real time on the shop floor.
MES forms the bridge between production planning (ERP) and automation (PLC/SCADA).
🧠 What does an MES do?
An MES tracks and steers everything that happens in the production process:
- Tracks production orders and progress
- Links people, machines and materials
- Collects data from the production environment
- Reports on performance, quality levels and downtime
🧱 Typical functions of an MES
| Function | Description |
|---|---|
| Production planning and execution | Real-time control of production orders |
| Traceability & genealogy | Capturing the full origin and journey of products |
| Quality management | In-process measurements, inspections, recording deviations |
| Machine and line monitoring | OEE (Overall Equipment Effectiveness), tracking downtime and faults |
| Material management | Consumption and availability of raw materials and components |
| Reporting & dashboards | Visual insights into KPIs and production performance |
📍 MES within the Purdue Model
| Level | System | Description |
|---|---|---|
| Level 4 | ERP | Strategic level: planning, customer orders |
| Level 3 | MES | Tactical level: execution and optimisation of production |
| Level 2 | SCADA / HMI | Operation and visualisation of processes |
| Level 1 | PLC / RTU | Direct control of machines |
📦 Examples of MES software
- Siemens Opcenter (formerly SIMATIC IT)
- Rockwell FactoryTalk ProductionCentre
- AVEVA Manufacturing Execution
- Dassault DELMIA Apriso
- Tulip, Ignition MES (modular platforms)
🎯 Benefits of MES
- Real-time visibility of production
- Less waste and fewer errors
- Better traceability (important for pharma, food, automotive)
- Faster problem resolution
- Foundation for digitalisation / Industry 4.0
📌 In summary
MES is the digital nervous system of the shop floor: it drives execution, collects data and connects the factory floor with the management level.