It's a standalone solution that integrates with the ERP. However, it's important to understand that ERP software focuses on business management, while an MES system deals with real-time production information. Another difference is that the former relies on data input, whereas an MES system operates automatically, using information extracted directly from the production process.
MES systems have been developed to gain control and insight into processes, and to help improve the production function of companies in a quantifiable way.
Having an MES system is crucial for evolving towards Industry 4.0, as it can make the difference between a traditional factory and a future-proof one. Therefore, it can determine whether a factory succeeds or fails and remains viable over time.

This tool integrates and centralizes information from the entire manufacturing process, automatically monitoring and managing it from a single point. It greatly facilitates real-time decision-making and helps reduce production times and costs. Furthermore, significant improvements can be achieved in other areas, such as quality management.
Implementing an MES system offers only advantages:

• Clearly defined processes.
• Increased factory efficiency and productivity.
• Greater supply chain agility.
• Reduced manufacturing times and costs.
• Reduced paper usage.
• Improved operations.
• Increased cost per person.
• Optimized energy consumption.
 
In short, improved production process quality thanks to real-time strategic information. Furthermore, Manufacturing Execution System solutions in production plants are considered a necessary tool for evolving towards Industry 4.0.

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