Modular OR Process Step 5: Quality Control & Factory Acceptance Testing

Published Oct 27, 2026 · Operating-Room.com Editorial Team

Introduction

The cheapest place to find a mistake is inside the factory. Step 5 is the quality-control (QC) and factory acceptance testing (FAT) stage, performed after production and before crating. MECART states its rule plainly: before shipping any prefab panels, doors or systems, "we always perform a quality check, by preassembling or testing it. We make sure everything is working as specified in the design before shipping." For a modular operating room — where every panel is unique and every joint must be airtight — pre-shipment verification is what protects the hospital opening date.

In-Line and Incoming Inspection

Quality is built into the line rather than inspected in at the end. Typical control points under an ISO 9001 system include:

Material verification. Mill certificates for the electrolytic galvanized and color-coated steel; batch records for rock wool and glass-MgO core boards; VOC test reports for adhesives and sealants, which are mandatory evidence for IVF laboratory projects.
Dimensional checks. Panel length, width, thickness, squareness and diagonal tolerance measured after cutting and again after pressing; opening positions for doors, windows and pass-through boxes compared to the CNC file.
Surface and edge inspection. Face flatness, coating integrity (anti-fingerprint finish), edge-frame bonding and gasket-seat continuity; panels are rejected for dents, disbonding or broken seals long before packing.
Embedded-service checks. Continuity and positioning of pre-wired conduits, socket and outlet boxes, earthing points and medical-gas channel blocks inside the panel cavity.

The Pre-Assembly Trial (Mock-Up Room)

The signature test of modular construction is erecting the room — or a representative section of it — inside the plant. Panels are laid out in erection order and joined with the same cam-locks, screws and corner profiles the site team will use. The trial proves:

Every panel matches its neighbour: flush faces, consistent 2–3 mm joints, correct handed corners and coved skirting alignment.
Door leaves swing and slide freely in their frames, hermetic seals compress evenly, and sensor doors respond to their activators.
Ceiling panels lock into the carrier grid and the laminar-flow ceiling aligns over the planned surgical field position.
Embedded cabinets, control panels, gas outlets and grilles land where the coordinated drawings promised.

Eucalyptus maintains a real-life modular operating theatre and showroom at its Suzhou facility, which doubles as a design-validation and client-demonstration asset; clients can attend or watch the trial remotely before authorising shipment. Anything that does not fit is corrected while the correction is still a workshop operation — not a crane-and-scaffold operation in a hospital corridor.

Performance and Safety Testing

Functional systems are tested as systems before they leave:

Airtightness and filtration. Laminar-flow ceilings and filter housings undergo DOP/PAO leak scanning for HEPA integrity; duct sections and plenum boxes are checked for air leakage; damper and diffuser operation is confirmed.
Pressure and airflow logic. Where an AHU or packaged air system is supplied, fan performance, interlocks and the pressure-gradient control sequence (cascade from the sterile core outward) are function-tested on the bench.
Electrical safety. Insulation resistance, protective-earth continuity, polarity and high-potential tests on wired panels and control cabinets; sensor doors tested for foot activation and infrared anti-pinch behavior.
Controls and monitoring. The multi-function LCD controllers, real-time temperature/humidity indicators and differential-pressure displays are powered and run through their menus and alarm thresholds.
Medical-gas circuits. Where outlet blocks and manifolds are factory-fitted, circuits are pressure-held and certified to the relevant gas-purity standard before sealing.

The FAT Package and Client Sign-Off

A formal factory acceptance test turns all of this into a documented gate. The FAT dossier normally contains:

Inspection and test plan (ITP) with signed hold/witness points.
Material certificates (steel, fire core), CE/ISO 9001 evidence and VOC reports.
Panel-by-panel dimensional and cosmetic check sheets keyed to panel IDs.
HEPA leak-scan reports, electrical safety certificates and controls function-test logs.
Photographs or video of the pre-assembled room, and any client punch-list items with close-out evidence.

Only after FAT sign-off is the build released to the packing stage. This is also the moment the as-built panel schedule is frozen, so the site installation manual and the shipped packing list describe exactly the same components.

Conclusion

Pre-assembly and FAT are the reason modular projects can promise rapid on-site assembly without chaos: the room has, in effect, already been built once in the factory and proven against the design. With signed test reports in the dossier, the panels move to export packing and global logistics — step 6.

Previous: Step 4 — Factory Prefabrication · Next: Step 6 — Packaging, Shipping & International Logistics. Sources: MECART — Manufacturing (pre-shipment quality checks); Eucalyptus — facility, certifications & showroom; Eucalyptus — zero-VOC and HEPA specification.