Do Not Perform Temperature Mapping During Active Operations

Never Conduct Temperature Mapping During Active GMP Operations

Remember: Temperature mapping should only be conducted in an empty or controlled environment—never during live operations, as this invalidates results and risks safety.

Why This Matters in GMP

Temperature mapping is a critical part of facility and equipment qualification. It verifies that temperature-controlled areas (e.g., warehouses, cold rooms, incubators) maintain uniform environmental conditions under various scenarios. Conducting mapping during active operations—when people, products, and processes are ongoing—compromises the validity of the data. Human movement, heat-generating equipment, or product placement can skew results, causing misleading conclusions about system performance. Furthermore, sensor wiring and data loggers may pose safety hazards or disrupt workflows. GMP emphasizes performing such studies under controlled, representative, and disturbance-free conditions for meaningful validation.

Also Read: Maintain Buffer Stocks of Critical Raw Materials to Prevent GMP Disruptions

Regulatory and Compliance Implications

FDA 21 CFR Part 211.63 requires equipment and environmental systems to be validated and maintained for proper function. EU GMP Annex 15 mandates that qualification studies, such as temperature mapping, be performed under defined, simulated worst-case but non-disruptive conditions. WHO GMP and Schedule M require mapping to reflect operational readiness without risking current production or invalidating results. Inspectors review mapping protocols, sensor placement plans, and timing to ensure

that mapping was conducted in a compliant and scientifically sound manner. Mapping during production may lead to validation failure or audit citations.

Implementation Best Practices

Schedule temperature mapping during shutdowns or non-production hours to minimize environmental interference.
Clearly document the equipment status—empty, fully loaded (simulated), or at rest—during the mapping run.
Install and calibrate sensors per protocol, ensuring no obstruction to operational activities or safety concerns.
Avoid performing mapping in the presence of active manufacturing, product movement, or people traffic.
Ensure QA review and approval of both the protocol and final validation report, including justification of test conditions.

Also Read: Ensure Tightness of Primary Packaging Before Dispatch in GMP

Regulatory References

FDA 21 CFR Part 211.63 – Equipment Design and Environmental Control
EU GMP Annex 15 – Qualification and Validation
WHO GMP – Mapping and Qualification of Controlled Areas
Schedule M – Validation of Storage and Processing Environments