What is an MES?

MES in one sentence

MES coordinates execution: it guides operators step-by-step, enforces checks and sign-offs, captures production and quality data at the source, and links everything into a single batch/lot genealogy.

Where MES sits in the stack

A simple way to think about it: ERP plans the what, machines provide the signals, and MES governs the how—with context.

• ERP: orders, materials, costs, planning
• SCADA/PLC: machine control and telemetry
• LIMS: lab results and controlled test workflows
• MES: execution steps, checks, deviations, traceability, electronic records

What MES actually does on the floor

• Run guided workflows (SOPs as steps, not PDFs)
• Enforce spec limits and quality checks at the point of work
• Capture structured data + evidence (forms, photos, timestamps)
• Handle deviations: holds, rework, approvals, escalation
• Build lot/batch genealogy from receiving through shipment
• Expose real-time status: running, blocked, overdue, released

When you need an MES

MES is most valuable when your risk and cost come from errors at handoffs: wrong material/lot, missed checks, inconsistent execution, slow investigations, and audit preparation overhead.