MES vs eQMS for Medical Device Manufacturers
The eQMS holds procedures and quality processes; the MES runs production and makes the device record. The risk sits where records cross between them.
In Short
- QMSR in force since 2 February 2026.
- Map every record that crosses systems.
- Validate either choice for intended use.
The Medical Device Production Guide
Built to revision. Inspected. On record.
- What the QMSR changed in February 2026
- Supplier to finished build
- Inspect, review, correct
We ask for your name and email so we can handle this request. The full guide then opens on this site, ready to translate, print or save. Privacy policy. Practical orientation, not legal advice; your quality unit decides which rules apply.
UltimateFree guide
The Medical Device Production Guide
Built to revision. Inspected. On record.
Since 2 February 2026, FDA's device quality rule (the QMSR) requires a quality management system that complies with ISO 13485 plus listed FDA requirements (21 CFR 820.10). An eQMS usually holds the procedures and quality processes; an MES runs production and produces the records of each device or lot. Sources checked 3 Oct 2026.
What an eQMS usually owns
Document control, training, supplier controls, complaints, nonconformances, CAPA, change control, audits and management review. These are the processes ISO 13485 and the QMSR expect you to define and keep records for.
What an MES usually owns
Work orders, routing to the approved revision, component lot capture, in-process inspection, operator and equipment checks, and the production record for each device or lot. 820.10(b) adds FDA requirements on unique device identification and traceability that these records support.
Who usually owns what
| Record or process | eQMS | MES |
|---|---|---|
| Procedures and training | Owns | Checks before a step |
| Production record per device or lot | Reviews | Creates |
| Nonconformance from inspection | Owns | Raises at the step |
| Component lots and UDI data | Defines rules | Captures |
- Procedures and training
- eQMS
- Owns
- MES
- Checks before a step
- Production record per device or lot
- eQMS
- Reviews
- MES
- Creates
- Nonconformance from inspection
- eQMS
- Owns
- MES
- Raises at the step
- Component lots and UDI data
- eQMS
- Defines rules
- MES
- Captures
Where the seam breaks
Problems arise where records cross: a failed inspection that must become a nonconformance, a document revision that must reach the line, a training record that must be checked before an operator signs. If two systems are used, each crossing needs a defined and tested interface.
Crossings to Test with Two Systems
Two systems or one
Two best-of-breed systems can work when the interfaces are designed, validated and maintained. One platform removes some interfaces but must still meet both sets of needs.
More on two systems or one
Either way, you validate for your intended use.
How to decide
List the records that must cross between quality and production, how often, and who acts on them. Ask each vendor to demonstrate those crossings with example data, then compare effort, validation and ongoing cost.
Questions
Does the QMSR require an MES?
No. It requires a compliant quality management system and records; it does not prescribe software.
When did the QMSR take effect?
2 February 2026.
Is one platform always better?
No. It removes interfaces but must meet both production and quality needs. Compare on your own records.
What does V5 cover?
Production execution and device records alongside nonconformances, CAPA, document control and training. People make quality decisions.
Practical orientation, not legal advice. Rules differ by jurisdiction; your quality and compliance team decides what applies.
Keep reading
Predetermined Change Control Plans (21 U.S.C. 360e-4) for Medical Devices
Australia Medical Device Regulatory Readiness Guide
Brazil medical device regulatory readiness guide (ANVISA)
Canada Medical Devices Regulations (SOR/98-282) Readiness
China Medical Device Regulatory Readiness Guide 2026
eDHR Implementation: A Medical-Device Rollout Guide