CryoNews

IQ, OQ, PQ: The three qualification levels of your cryogenic infrastructure explained clearly

Three letters, three levels, one mission: Proven reliability

In the pharmaceutical and biomedical industry, it is not enough for a device to work. It must be proven that it works - in accordance with the specified requirements, under the actual operating conditions and over a defined period of time. This proof is provided by the qualification process, which consists of three successive stages: IQ (Installation Qualification), OQ (Operational Qualification) and PQ (Performance Qualification).

Every cryotank, every controlled rate freezer and every monitoring system in a GMP-regulated cryobank must undergo this process. Consarctic® offers a complete IQ/OQ service and also supports its customers in performing PQ.

In this article, we explain the three stages in a practical way and show what is important when qualifying your cryogenic infrastructure.

IQ - Installation qualification: Is everything installed correctly?

The IQ is the first stage and checks whether the equipment has been installed correctly and completely - in accordance with the manufacturer's specifications and the site-specific requirements.

What is documented

  • Delivery check: Completeness of the delivery, conformity of the serial numbers with the order, external condition of the devices.
  • Installation environment: Room temperature, humidity, floor load-bearing capacity, ventilation - do the ambient conditions comply with the manufacturer's requirements?
  • Supply connections: Power supply (voltage, frequency, fuse protection), LN2 connection, network connection for monitoring.
  • Software version: Is the documented software version installed?
  • Calibration certificates: Are the current calibration certificates available for all sensors?

Typical result

An IQ document for a Consarctic® BSD+ stainless steel tank includes serial number verification, documentation of the installation position, verification of all connections and confirmation that the tank has been installed in accordance with the manufacturer's specifications.

OQ - Functional qualification: Does the device do what it is supposed to?

The OQ proves that the equipment fulfills the specified functions under defined test conditions. In contrast to the IQ, which only tests the installation, the OQ tests the actual function.

Temperature Mapping

For cryogenic tanks, temperature mapping is the core component of OQ. Calibrated temperature sensors are placed at defined positions within the tank - typically at the top, middle and bottom of several racks. The temperature distribution is recorded over a defined period (e.g. 24-72 hours).

What is proven

  • Temperature limits: All measuring positions are within the specified limits (e.g. below -150°C for the gas phase).
  • Temperature gradient: The gradient between the warmest and coldest position is documented and acceptable.
  • Influence of the lid: The temperature rise when opening and closing the lid is measured and documented.
  • Alarm functions: The alarms of the monitoring system are tested by simulated limit value violations.

For the BIOFREEZE®

With a controlled rate freezer, the OQ includes verification of all pre-installed freezing programs: Is the programmed cooling rate being maintained? Is the TC-Active function working? Is the final temperature reached? Is the data recorded correctly?

PQ - Performance qualification: Does it work in everyday life?

The PQ goes beyond the OQ and proves that the equipment functions reliably under real operating conditions - with actual samples, actual personnel and actual workflow.

Typical PQ checks

  • Process validation: A complete freezing process with representative samples is carried out and documented.
  • User interaction: Typical everyday actions (sample storage, sampling, tank access) are simulated under real conditions and the effects on the temperature are measured.
  • Worst-case scenarios: What happens when several racks are accessed at the same time? How quickly does the temperature recover after a long access time?

Documentation: more than just paperwork

The qualification documentation is a living document that forms the basis for the regulatory compliance of your cryobank. Inspectors from the competent authorities will specifically ask for the IQ/OQ/PQ documents during audits. Incomplete or incorrect documentation can lead to complaints.

Requalification: not a one-off affair

Qualification is not a one-off process. Requalifications are required in the following situations:

  • After a repair or conversion of the appliance.
  • After a change of location.
  • At regular intervals (e.g. every 2-3 years) as proof of ongoing suitability.
  • After a significant software change.

Consarctic® IQ/OQ service

Consarctic® offers a professional IQ/OQ service that includes full qualification documentation. Our trained technicians carry out all tests on site and prepare the documentation in accordance with current GMP requirements. On request, we can also provide support with the planning and implementation of the PQ.

Do you need qualification of your cryogenic infrastructure? Contact our qualification experts for a timely and professional implementation.