Technical depth
Check command of ISA-95 layers, MES/MOM platforms (SAP DMC, Ignition, Opcenter), OPC UA and MQTT connectivity, historians, and how they model OEE and downtime taxonomies.
Evidence to listen for
- Explains the physics or mechanism behind their work, not just the tooling
- Names the standards, tolerances, and constraints they designed against
- Can defend a design decision under follow-up questions
- Distinguishes what they personally engineered from what the team delivered
Five-point scoring guide
Cannot explain the fundamentals of their own stated specialism.
Knows the vocabulary but not the underlying mechanism; struggles under follow-ups.
Solid working knowledge for the role; depth thins out on edge cases.
Strong command of the domain; explains trade-offs and defends decisions well.
Names specific MES and edge stacks deployed, explains ISA-95 level integration and tag architecture without retreating into Industry 4.0 buzzwords.