MOM

MOM (Manufacturing Operations Management) is the ISA-95 Level 3 superset of MES — the operational layer between ERP scheduling and shop-floor control that orchestrates production, quality, maintenance, and inventory in real time. Where MES historically focused on production execution, MOM adds the surrounding operations — quality (LIMS-adjacent), reliability/maintenance, and warehouse/inventory at the plant tier — and is the layer that consumes the MBOM and routings from PLM.

What it covers

• Production operations — order release, dispatching, tracking, and as-built data collection.
• Quality operations — in-process checks, NCR creation, hold/release, SPC.
• Maintenance operations — work orders, condition-based triggers, calibration.
• Inventory operations — WIP, kanban, replenishment at the plant.
• ISA-95 boundary with ERP above (Level 4) and PLC/SCADA/HMI below (Levels 1–2).

Relationships (see sidebar)

• Depends on the MES / Process Simulation, Industrial Connectivity, and Manufacturing Routing capabilities.
• Supports the Manufacturing Execution and Quality Management processes.
• Implemented by Siemens Opcenter.