MES: 1 standard, 11 functions

A Manufacturing Execution System includes 11 core functions defined by the ISA-95 standard.

ISA-95 MES Functions:

  • Data acquisition

  • Production scheduling

  • Personnel management

  • Resource management

  • Production tracking and dispatch

  • Traaceability and geneologie

  • Quality control

  • Process management

  • Performance analysis

  • Document management

  • Maintenance management

Practical application of the MES functions

The specific details of each function may differ depending on the software system.  However, they should all share the following key points.

  • Data collection and acquisition

Allow the input of all information during production, manually and/or automatically.

  • Scheduling

Provide a global view of the planned production orders and their production routing including electronic job cards.

  • Staff management

Manage the necessary skills and authorizations for people, products and/or operations.

  • Resource Management

Define and track the status of each resource associated with producing the production unit (production tools, machines, breakdowns, material shortage, etc.).

  • Production tracking and dispatch

Manage the bidirectional flow of production data in real time between the ERP and the workshop.

  • Product traceability and genealogy

Associate a final part or batch with all its manufacturing data from the raw material to the component assembly.

  • Quality management

Manage the quality of manufacturing processes and units including quality deviations and exceptions. This function can be integrated directly into the MES software or can use external software such as SPC software and NCMS (non-conformance management system).

  • Process management

Provide process routing and operational sequencing including full traceability.

  • Performance Analysis

Consolidate data to calculate the key performance indicators such as Right first time (RFT), Rework, Scrap, Process capability (Cpk), Overall equipment effectiveness (OEE), Opportunities, etc.

  • Document Management

Make available to the operator at the correct time the documents (instructions, drawings, notes) necessary to carry out their work.

  • Maintenance management

Optimize the planning of preventive maintenance operations to reduce the impact on manufacturing.

All of these functions occur at different levels of the workshop to meet the needs of each stakeholder in the production process.