In every Philippine pharmaceutical company, hospital pharmacy, and GMP-regulated food facility, a set of three abbreviations appears repeatedly in qualification documentation, audit findings, and regulatory correspondence: IQ, OQ, PQ.

Installation Qualification. Operational Qualification. Performance Qualification.

Together, these three phases constitute the formal qualification lifecycle that GMP guidelines, WHO standards, PIC/S Annex 15, and FDA Circular 2021-003 require for critical equipment and facilities — including pharmaceutical cold rooms, temperature-controlled warehouses, stability chambers, and any other controlled environment where product quality depends on demonstrating that the facility performs as intended, consistently and verifiably, under its actual operating conditions.

Yet for many Philippine QA managers and project teams, the distinction between these three phases — and between qualification and related concepts like commissioning and validation — remains fuzzy in practice. The terminology is used interchangeably by some service providers, misapplied in some documentation, and sometimes treated as bureaucratic labels for what is essentially the same activity conducted at different stages of the project.

This article clarifies precisely what commissioning, IQ, OQ, and PQ mean — how they differ, how they relate to each other, and most importantly, where thermal mapping fits within the IQ/OQ/PQ framework for Philippine pharmaceutical cold rooms and temperature-controlled warehouses. It is the foundational article that makes the rest of the thermal mapping series fully comprehensible to Philippine QA professionals who are managing or planning qualification programmes for the first time.

The One-Paragraph Summary Before We Go DeepCommissioning: Engineering verification that equipment is installed correctly and operates as specified — not yet a GMP document, but the foundation for qualification. IQ: Documented evidence that equipment was installed according to approved design specifications. OQ: Documented evidence that equipment operates as intended under defined conditions — thermal mapping of an empty cold room is the core OQ activity for cold rooms. PQ: Documented evidence that equipment performs reliably under actual operational conditions — thermal mapping of a loaded cold room under real operating patterns is the core PQ activity. Together, IQ + OQ + PQ constitute the qualification package that GMP, WHO, and FDA require before a cold room or warehouse can be used for pharmaceutical product storage.

1. The Vocabulary Problem: Why IQ/OQ/PQ Confuses Philippine QA Teams

The IQ/OQ/PQ framework was developed in the pharmaceutical manufacturing context — primarily for validating manufacturing equipment (tablet presses, filling lines, sterilisers) rather than for qualifying storage facilities. As the framework was adapted to storage qualification, its application evolved — and the vocabulary around it became less consistent.

Today, different service providers, regulatory guidance documents, and internal quality management systems use related terms with overlapping but not identical meanings. Understanding these distinctions prevents the confusion that leads to incomplete qualification packages and unnecessary repeat studies.

Commissioning vs. Qualification: The Engineering-to-GMP Transition

Commissioning is an engineering activity — the process of verifying that newly installed equipment or systems are installed correctly, connected properly, and capable of operating within their specified parameters. Commissioning is conducted by the project team or installation contractor, typically with input from the engineering and facilities functions. It is primarily a technical verification activity, not a GMP quality documentation activity.

Qualification is a GMP activity — the formal, documented process of demonstrating that a system meets its predefined requirements for its intended use. Qualification is conducted under a quality management framework, with pre-approved protocols, formal documentation, and approval signatures. Qualification produces GMP records that can be presented to regulatory inspectors as evidence of compliance.

The distinction matters because: a facility that has been commissioned but not qualified has evidence that it was installed correctly — but not documented evidence that it meets GMP requirements for pharmaceutical product storage. Commissioning is necessary but not sufficient for GMP compliance. Qualification builds on commissioning and adds the quality documentation layer that converts technical verification into regulatory compliance evidence.

Qualification vs. Validation: The Scope Distinction

In GMP terminology, qualification applies to equipment and facilities — demonstrating that a specific cold room, warehouse, or refrigerator meets its defined requirements. Validation applies to processes — demonstrating that a specific process (cleaning, sterilisation, temperature control as a process) consistently produces results meeting its specifications.

For temperature-controlled storage in the Philippine pharmaceutical context:

• The cold room itself is qualified (IQ/OQ/PQ)
• The temperature monitoring system installed in the cold room is also qualified (sensor placement validation, alarm system validation)
• The process of managing temperature-controlled storage — including loading procedures, door-opening protocols, response to alarms — may be described as validated in the broader sense

In practice, the terms are sometimes used interchangeably in industry documentation. What matters for regulatory compliance is not the specific vocabulary used but the completeness of the evidence: that the equipment was installed correctly, operates as intended, and performs consistently under real conditions.

The CQV Framework: Commissioning, Qualification, and Validation Together

Modern pharmaceutical facility qualification programmes increasingly use the CQV (Commissioning, Qualification, and Validation) framework — a lifecycle approach that integrates all three activities into a coherent programme. <cite index=’12-1′>CQV stands for commissioning, qualification, and validation. Pharma commissioning qualification validation (CQV) is the FDA-expected life cycle that proves your warehouse, cold room, or any other storage space will continuously protect product quality.</cite>

Under the CQV framework, commissioning and qualification activities are planned and executed in a coordinated sequence — with commissioning activities documented in a way that feeds directly into qualification documentation, reducing duplication of effort and accelerating the path from installation to operational readiness.

Typical CQV timeline estimates for Philippine temperature-controlled storage projects: cold room/freezer qualification 2 to 3 months; warehouse qualification 5 to 7 months. These timelines assume adequate planning and preparation — organisations that begin qualification documentation after construction is complete typically take longer than those that plan the qualification programme before the building contract is signed.

2. The Four Phases in Detail

The complete qualification lifecycle for a Philippine pharmaceutical cold room or temperature-controlled warehouse consists of four phases that build on each other sequentially. Each phase has defined activities, specific outputs, and clear acceptance criteria.

Phase 0  —  Commissioning

When: During construction and installation, before IQ begins   |   Purpose: Engineering verification that all equipment is installed correctly and systems are connected and operational

Key Activities:Equipment receipt verification (serial numbers, model numbers match purchase order); installation verification (refrigeration unit, piping, electrical connections, insulation panels, door seals, sensors); utilities verification (power supply, drainage, emergency generator connection); equipment startup and initial performance check (refrigeration system achieves setpoint; alarms function); contractor punch-list resolutionKey Output: Commissioning report documenting all verification activities — forms the technical foundation for the IQ phase

IQ  —  Installation Qualification

When: After commissioning is complete, before OQ begins   |   Purpose: Formal GMP documentation that the equipment was installed according to approved specifications

Key Activities:Review and approve the User Requirements Specification (URS) and Design Qualification (DQ) if applicable; verify that installed equipment matches the approved specifications (refrigeration unit model, insulation panel thickness, door seal type, monitoring sensor model, alarm system); verify that calibration certificates are available for all installed measuring instruments; verify that operating manuals, maintenance procedures, and SOPs are available; confirm that the environmental conditions required for the storage area (electrical supply, temperature of adjacent areas, drainage) are present and documentedKey Output: Approved IQ report with documented evidence that installation matches approved specifications; this report becomes part of the permanent qualification file

OQ  —  Operational Qualification

When: After IQ is approved and accepted, before PQ begins   |   Purpose: Documented evidence that the equipment operates as intended under defined conditions — typically empty room conditions

Key Activities:Temperature mapping of the empty cold room or warehouse under defined conditions (OQ mapping is the core thermal mapping study in the qualification lifecycle); alarm testing (confirm high and low temperature alarms activate at specified trigger points); power failure testing (confirm refrigeration unit achieves the specified holdover time and generator activates within the specified response time); door-opening and recovery testing (confirm temperature returns to within setpoint after defined door-opening events); setpoint stability verification (confirm the refrigeration system maintains the setpoint within defined tolerance under empty conditions); defrost cycle impact assessment (confirm defrost cycles do not cause temperature excursions beyond defined limits)Key Output: Approved OQ report including the thermal mapping study report and all supporting test documentation

PQ  —  Performance Qualification

When: After OQ is approved, before the cold room is released for product storage   |   Purpose: Documented evidence that the equipment performs consistently under actual operational conditions with product or simulated load

Key Activities:Temperature mapping of the loaded cold room or warehouse at operational stock levels (PQ mapping); door-opening pattern simulation at operational frequency (representing peak production or delivery day patterns); extended monitoring period demonstrating stable temperature control over a representative operational period (typically 30 days of monitoring data or a defined study period); seasonal performance confirmation (if OQ was conducted in cool season, PQ or a seasonal remapping study must confirm summer performance before the space is fully qualified for year-round use)Key Output: Approved PQ report confirming operational performance; this report completes the initial qualification package and authorises the storage area for pharmaceutical product use

3. Where Thermal Mapping Fits in the IQ/OQ/PQ Framework

For Philippine pharmaceutical cold rooms and temperature-controlled warehouses, thermal mapping is the core technical activity within both OQ and PQ. Understanding exactly how mapping fits into each qualification phase — and what is different between an OQ mapping study and a PQ mapping study — is essential for planning a compliant qualification programme.

OQ Mapping: Empty Room, Defined Conditions

The Operational Qualification thermal mapping study is conducted with the cold room or warehouse empty — no product, no racking (or empty racking frames only), and with the refrigeration/HVAC system operating under its normal setpoint settings. The purpose of the OQ mapping study is to characterise the thermal performance of the space under controlled conditions, before the complexity of real operational loading is introduced.

The OQ mapping study establishes:

• The temperature distribution throughout the empty room volume — identifying hot spots (positions with consistently higher temperatures) and cold spots (positions with consistently lower temperatures) under empty conditions
• The temperature uniformity of the space — the maximum temperature difference between the hottest and coldest sensor positions at any point during the study period
• The time for the empty room to reach stable operating conditions from ambient — the stabilisation time that must be achieved before product can be introduced after the room has been brought from ambient to setpoint
• The power failure holdover time for the empty room — the time from power interruption to the first sensor reaching the upper acceptance limit
• The door-opening temperature impact and recovery time under empty conditions — how long after a defined door-opening event the temperature returns to within the acceptance criteria

The OQ mapping study is typically conducted under Philippine summer ambient conditions to capture the worst-case thermal performance of the space. The OQ report must include PAB-accredited calibration certificates for all data loggers used in the study.

PQ Mapping: Loaded Room, Operational Conditions

The Performance Qualification thermal mapping study is conducted with the cold room or warehouse loaded to a representative operational stock level — typically 70% to 80% of maximum capacity — and with the door-opening frequency representing a typical operational day. The purpose of the PQ mapping study is to demonstrate that the space maintains the required temperature under conditions that reflect its actual use.

The PQ mapping study may show different hot spot positions and different temperature gradients from the OQ study — because the thermal mass of the product load affects temperature distribution. Product stored in racking absorbs thermal energy and moderates temperature fluctuations, but dense product loads also impede air circulation, potentially creating thermal pockets at positions that were within compliance under empty OQ conditions.

The PQ study also tests the door-opening protocol under operational conditions — simulating the actual receiving, picking, and shipping door-opening pattern of the storage area’s busiest day. The OQ door-opening test uses a simplified defined pattern; the PQ test uses the actual operational pattern.

A critical Philippine consideration for PQ: if the OQ mapping study was conducted under cool-season ambient conditions (November to February), a PQ study or seasonal remapping under summer ambient conditions (April to May) is required before the space can be considered fully qualified for year-round pharmaceutical product storage. The PQ qualification cannot be considered complete without documented summer performance.

The Difference Between OQ and PQ Mapping: A Practical Comparison

Element	OQ Mapping (Operational Qualification)	PQ Mapping (Performance Qualification)
Room loading	Empty or empty racking only	Loaded at 70–80% operational stock level
Door-opening protocol	Defined test protocol (e.g., specified number of openings at defined intervals)	Actual operational door-opening pattern at peak-day frequency
Study duration	Minimum 72 hours after stabilisation	Minimum 72 hours under operational conditions; often extended to 7 days for warehouses
Sensor positions	Standard geometric grid plus identified risk positions	Same or adapted based on OQ findings plus any product-specific risk positions
Power failure test	Required — empty room holdover	Optional in PQ if OQ holdover data is available; recommended for loaded room comparison
Ambient conditions	Philippine summer conditions recommended	Philippine summer conditions recommended; seasonal pair (OQ summer + PQ wet season) provides comprehensive coverage
Key output	Identifies hot/cold spots in empty room; establishes stabilisation time; establishes empty-room holdover time	Confirms performance under operational loading; may reveal new hot spots from air circulation blockage; validates operational door-opening protocol
GMP purpose	Demonstrates the equipment works as intended (equipment qualification)	Demonstrates the equipment performs reliably under use (performance confirmation)
Required before	PQ begins; cold room cannot receive product until OQ is approved	Cold room can receive product only after PQ is approved (or with documented risk-accepted interim controls)

4. The Philippine Regulatory Basis for IQ/OQ/PQ

The IQ/OQ/PQ qualification requirement for pharmaceutical cold rooms and temperature-controlled warehouses in the Philippines is embedded in multiple regulatory frameworks. Understanding which framework applies to your organisation, and how it references the IQ/OQ/PQ methodology, clarifies why qualification is mandatory rather than merely recommended.

PIC/S GMP Annex 15: Qualification and Validation

The PIC/S Good Manufacturing Practice guidelines — which the Philippine FDA applies to pharmaceutical manufacturers and increasingly references for pharmaceutical distributors — include Annex 15 on Qualification and Validation. Annex 15 specifies that equipment and facilities used in pharmaceutical manufacturing and storage must be qualified, with documented IQ, OQ, and PQ phases. The annex requires that qualification is conducted according to pre-approved protocols, that acceptance criteria are predefined, and that results are documented in formal qualification reports with approval signatures.

For Philippine pharmaceutical establishments subject to GMP requirements — including drug manufacturers, large distributors, and contract storage operators — PIC/S Annex 15 is the primary technical framework for cold room and warehouse IQ/OQ/PQ requirements.

WHO TRS 1010 Annex 7: Good Storage and Distribution Practice

WHO Technical Report Series No. 1010 Annex 7 (2021) — the current WHO Good Storage and Distribution Practice guideline referenced by FDA Circular 2021-003 — requires that storage facilities be qualified before use and that the qualification include temperature mapping studies demonstrating compliance with the required storage conditions. WHO Annex 7 aligns with the IQ/OQ/PQ framework without using those exact terms — referring to installation verification, operational testing, and performance demonstration as the required qualification elements.

WHO TRS 961 Supplement 8: Temperature Mapping

WHO TRS 961 Supplement 8 — the specific WHO guidance on temperature mapping for pharmaceutical storage — provides the detailed technical requirements for the OQ and PQ mapping studies within the IQ/OQ/PQ framework. It specifies sensor density, calibration requirements, study duration, power failure test requirements, and documentation standards. This supplement is the technical backbone of the OQ and PQ mapping activities.

FDA Circular 2021-003

FDA Circular 2021-003 requires Philippine pharmaceutical establishments to implement cold chain management in accordance with WHO Good Distribution Practice. This circular, while not prescribing the specific IQ/OQ/PQ terminology, requires that storage facilities demonstrate temperature control capability — which in practice means conducting IQ/OQ/PQ qualification studies as described in the WHO and GMP guidelines the circular references.

FDA inspectors reviewing cold chain management documentation for Philippine pharmaceutical establishments will look for: evidence of initial qualification (IQ and OQ); evidence of performance qualification (PQ); evidence of ongoing monitoring and periodic requalification; and documentation of any changes that triggered requalification. The absence of any of these elements represents a compliance gap.

5. Timeline and Sequencing: When Does Each Phase Happen?

One of the most common questions from Philippine facility project teams is: how long will the IQ/OQ/PQ process take, and when should we start planning it? The answer depends on the facility type and complexity, but the CQV framework provides benchmark timelines.

Standard Timelines for Philippine Pharmaceutical Storage Qualification

Based on experience qualifying pharmaceutical cold rooms and warehouses in the Philippines, the following timelines provide realistic planning benchmarks:

Facility Type	Commissioning	IQ	OQ (incl. thermal mapping)	PQ (incl. thermal mapping)	Total from installation to PQ approval
Small pharmaceutical cold room (up to 20 cubic metres)	2 to 4 weeks	2 to 3 weeks	4 to 6 weeks (including 72-hour study + analysis + report)	4 to 6 weeks (including 72-hour study + analysis + report)	3 to 5 months
Medium pharmaceutical cold room (20 to 100 cubic metres)	3 to 6 weeks	3 to 4 weeks	5 to 8 weeks	5 to 8 weeks	4 to 6 months
Large pharmaceutical warehouse (500+ square metres)	2 to 3 months	4 to 6 weeks	8 to 12 weeks (7-day study + summer study if needed)	8 to 12 weeks	5 to 8 months
Hospital pharmacy refrigerator (unit)	1 week	1 to 2 weeks	2 to 3 weeks (72-hour study)	2 to 3 weeks	2 to 3 months
Reefer truck / transport vehicle	1 week	1 to 2 weeks	2 to 3 weeks (transport study)	2 to 3 weeks (loaded transport study)	2 to 3 months

The Most Common Philippine Qualification Timeline MistakeMany Philippine pharmaceutical facility projects begin qualification planning only after construction is complete — by which time the installation contractor has already left the site, commissioning records may be incomplete or unavailable, and the project team is under pressure to start using the facility immediately.Qualification planning must begin during the design phase — before construction starts. The User Requirements Specification (URS), the Design Qualification (DQ), and the IQ protocol should all be drafted during the design phase so that the installation contractor’s work can be reviewed against approved specifications as it progresses. This parallel planning approach dramatically reduces the total time from completion of construction to receipt of approved PQ documentation.

The Seasonal Timing Challenge for Philippine Qualification

For Philippine pharmaceutical cold rooms and warehouses, the IQ/OQ/PQ timeline has a specific seasonal constraint that does not exist in temperate-climate qualification programmes: WHO TRS 961 Supplement 8 requires that thermal mapping studies be conducted under the most challenging ambient conditions. For Philippine facilities, this means the OQ and PQ mapping studies should be conducted during the hot dry season (March to May) — the period when Philippine ambient temperatures are at their peak and the thermal challenge to refrigeration systems is greatest.

Projects that complete construction in June or July face a choice: begin OQ mapping immediately (in wet season conditions) and plan a follow-up summer mapping study before the full qualification is considered complete, or delay the qualification to the following April/May (a wait of 9 to 10 months). The practical approach for most Philippine facility projects is the former: conduct the initial OQ mapping study as soon as commissioning is complete, flag the seasonal gap in the qualification documentation, and commit to a summer remapping study to complete the seasonal qualification coverage before the first anniversary of the facility’s operation.

6. The User Requirements Specification and Design Qualification: Starting Right

Before IQ begins, two planning documents should be prepared that establish the basis of the entire qualification programme. In practice, many Philippine pharmaceutical facility projects skip these documents — proceeding directly to construction without a formal URS or DQ. This shortcut creates problems downstream: without a URS, there is no agreed-upon definition of what the cold room is required to do, making it difficult to write acceptance criteria for the OQ and PQ that are genuinely protective rather than arbitrarily specified.

The User Requirements Specification (URS)

The URS is the document that defines what the storage facility must achieve — in user-defined terms, not in engineering specifications. For a pharmaceutical cold room URS, the key requirements typically include:

• Required temperature range: The cold room must maintain +2°C to +8°C throughout its full storage volume under all anticipated operational conditions
• Required humidity range (if applicable)
• Storage capacity: The cold room must accommodate [X] pallet positions at the required temperature
• Door-opening frequency: The refrigeration system must maintain temperature within acceptance criteria when doors are opened at the frequency of normal operations (specify maximum frequency)
• Power failure holdover: The cold room must maintain temperature within acceptance criteria for a minimum of [Y] minutes following power failure
• Alarm requirements: High and low temperature alarms must activate within [Z] minutes of an out-of-range condition
• Monitoring requirements: A continuous temperature monitoring system must record temperature at defined intervals and must be calibrated annually
• Applicable standards: The cold room must be qualified in accordance with WHO TRS 961 Supplement 8, GMP Annex 15, and FDA Circular 2021-003

The URS, once approved, becomes the reference document for all subsequent qualification activities — the IQ verifies that the installation meets the URS specifications, and the OQ and PQ acceptance criteria are derived from the URS requirements.

Design Qualification (DQ)

The Design Qualification is the document that demonstrates that the approved design of the cold room or warehouse will, if built correctly, meet the URS requirements. The DQ reviews the engineering design — refrigeration system capacity, insulation specifications, door seal specifications, monitoring system design — and confirms that each design element addresses the corresponding URS requirement.

For the most common Philippine pharmaceutical cold room qualification scenario (a new cold room is being built for a pharmaceutical distributor), the DQ may be relatively straightforward — confirming that the refrigeration unit specified in the design is sized adequately for the required temperature, that the insulation panels meet the required R-value for Philippine summer ambient conditions, and that the monitoring system includes sensors and alarms meeting the URS requirements.

7. Requalification: When Does the IQ/OQ/PQ Need to Be Repeated?

Initial qualification (IQ/OQ/PQ) demonstrates that a cold room or warehouse meets its requirements at the time of qualification. Ongoing compliance requires periodic requalification — confirming that the facility continues to meet its requirements as equipment ages, operating conditions change, and the regulatory environment evolves.

GMP Annex 15 requires that a requalification plan be established, specifying the triggers and frequency for requalification studies. For Philippine pharmaceutical cold rooms and warehouses, the following events trigger immediate or planned requalification:

• Significant modifications: Any change to the cold room’s refrigeration system, insulation, door seals, monitoring system, or HVAC that could affect temperature distribution or control requires IQ/OQ/PQ requalification for the modified elements
• Equipment relocation: Moving a cold room unit or refrigerator to a different location requires full requalification in the new location
• Refrigeration system repair or component replacement: Major refrigeration repairs — compressor replacement, refrigerant recharge, evaporator replacement — trigger OQ requalification to confirm the repaired system still meets performance requirements
• Monitoring data indicating performance drift: If ongoing temperature monitoring data shows a systematic trend toward higher temperatures, longer alarm events, or increased temperature variability, this is a signal for planned requalification before the trend becomes a compliance failure
• Periodic scheduled requalification: In the absence of any specific trigger, pharmaceutical cold rooms and warehouses should undergo periodic requalification — most organisations conduct OQ/PQ mapping every two to three years as a matter of routine practice
• Seasonal remapping: As described in Article 7 of this series, Philippine facilities should conduct annual thermal mapping studies under summer ambient conditions even between full IQ/OQ/PQ requalification cycles — confirming that seasonal ambient variation does not cause compliance failures that were not present at the time of the most recent qualification study

8. Frequently Asked Questions: IQ, OQ, PQ for Philippine Facilities

If our cold room passed its initial OQ thermal mapping study, can we skip the PQ study?

No — the OQ and PQ are distinct qualification phases that serve different purposes. The OQ demonstrates that the empty cold room operates within acceptance criteria. The PQ demonstrates that the loaded cold room performs under actual operational conditions. These are not interchangeable: a cold room that passes OQ under empty conditions may show different temperature distribution under the thermal mass of a product load, may have different hot spot positions when racking reduces air circulation, and will show different door-opening temperature impacts when operational door frequency is higher than the OQ test protocol. Both studies are required for a complete qualification package under PIC/S Annex 15 and WHO GMP guidelines.

Our cold room was commissioned by the installation contractor. Does this count as IQ?

Commissioning and IQ are closely related but not identical. Commissioning is an engineering verification — it confirms the room was installed correctly and operates within contractor specifications. IQ is a GMP quality documentation — it formally documents, under a quality management framework with pre-approved protocols and formal approval signatures, that the installation meets the defined URS and design specifications. The commissioning records produced by the installation contractor can and should be referenced as supporting evidence in the IQ documentation, but they do not replace the IQ. A formal IQ protocol must be approved, the commissioning records must be reviewed against the protocol, and an IQ report must be generated with formal QA signatures before the IQ phase is complete.

What is the minimum number of sensors for OQ thermal mapping of a pharmaceutical cold room?

WHO TRS 961 Supplement 8 and ISPE guidance do not specify a universal minimum sensor count — they require adequate coverage of the full storage volume with emphasis on identified risk positions. For a standard pharmaceutical cold room of up to 20 cubic metres, a minimum of 12 to 16 sensors is generally accepted industry practice. For larger cold rooms (20 to 100 cubic metres), 20 to 35 sensors provide adequate spatial resolution. The number should be determined by a risk-based sensor placement rationale documented in the OQ protocol — not by cost or convenience. An OQ study with fewer sensors than needed to credibly characterise the full room volume will be challenged by regulatory inspectors.

Can the OQ and PQ mapping studies be conducted simultaneously?

No — the OQ must be completed and approved before the PQ begins. The OQ establishes the baseline thermal performance of the empty room, which informs the risk-based sensor placement for the PQ study. If the OQ reveals hot spot positions that were not anticipated in the original sensor placement design, the PQ sensor plan can be adjusted to provide additional coverage at those positions. Running OQ and PQ simultaneously eliminates this feedback loop and produces a PQ study that may not be positioned at the most important locations identified by OQ.

We use our cold room for both pharmaceutical and non-pharmaceutical products. Does the whole room need to be qualified to pharmaceutical GMP standards?

For regulatory compliance purposes, only the areas used for pharmaceutical product storage need to be formally qualified to pharmaceutical GMP standards. However, if the pharmaceutical and non-pharmaceutical storage areas are physically the same space — the same cold room or the same warehouse — the qualification must cover the full space, because temperature conditions in the non-pharmaceutical zones may affect the temperature in the pharmaceutical zones. If your facility has physically segregated areas for pharmaceutical and non-pharmaceutical products (separate cold rooms, separate warehouse areas with physical partitions), the qualification scope can be limited to the pharmaceutical storage areas — but the physical segregation must be documented and demonstrated to prevent cross-contamination of temperature conditions.

Conclusion: Qualification Is Not a Box to Tick — It Is the Foundation of Everything

IQ, OQ, and PQ are not procedural formalities. They are the documented evidence that a pharmaceutical cold room or temperature-controlled warehouse was built correctly, operates as intended, and performs reliably under actual operational conditions. Without this evidence, every product decision made about that storage area — what can be stored there, how much, for how long, under what conditions — rests on an unverified assumption.

For Philippine pharmaceutical companies, hospital pharmacies, cold chain distributors, and food businesses operating under GMP or HACCP frameworks, the IQ/OQ/PQ qualification lifecycle is the quality infrastructure that makes compliance documentation meaningful. A thermal mapping study conducted as part of a properly structured OQ — with a pre-approved protocol, PAB-accredited calibrated instruments, documented ambient conditions, power failure testing, and formal QA-approved reporting — is fundamentally different from the same temperature measurements collected without this framework. The first is qualification evidence. The second is data.

Metrologie Solutions Philippines provides the full IQ/OQ/PQ qualification lifecycle for Philippine pharmaceutical cold rooms and warehouses — from commissioning support and IQ documentation assistance through OQ and PQ thermal mapping studies to ongoing seasonal remapping and periodic requalification. Our qualification services are built around Philippine regulatory requirements, Philippine ambient conditions, and Philippine industry practice.

Ready to Qualify Your Cold Room or Warehouse?Contact Metrologie Solutions Philippines to discuss your IQ/OQ/PQ qualification programme — whether you are commissioning a new facility, completing an interrupted qualification, or planning periodic requalification of an existing facility.Website: metrologiesolutions.com   |   Services: IQ/OQ/PQ Qualification · Thermal Mapping · Calibration · Training

About Metrologie Solutions PhilippinesMetrologie Solutions Philippines provides the full IQ/OQ/PQ lifecycle for pharmaceutical cold rooms and warehouses throughout the Philippines — from installation qualification documentation and commissioning support through operational qualification thermal mapping (OQ mapping) and performance qualification studies (PQ mapping). Our qualification services are built for Philippine regulatory requirements: FDA Circular 2021-003, WHO TRS 961 Supplement 8, PIC/S GMP Annex 15, and international principal qualification standards.Website: metrologiesolutions.com   |   Services: IQ/OQ/PQ Qualification · Thermal Mapping · Calibration · Training