--- title: "IQ / OQ / PQ, Definition | MedTech Terms" description: "Installation, Operational, and Performance Qualification - the three stages of equipment and process qualification." lang: en json-ld: | { "@context": "https://schema.org", "@graph": [ { "@type": "DefinedTerm", "@id": "https://medtechterms.com/terms/iq-oq-pq#term", "name": "IQ / OQ / PQ", "description": "IQ verifies that equipment is installed per specification; OQ verifies that it operates within defined limits; PQ verifies that the integrated process consistently produces conforming output. 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It's crucial for demonstrating conformity to specifications and regulatory requirements." } }, { "@type": "Question", "name": "Can IQ/OQ/PQ be skipped for non-critical equipment?", "acceptedAnswer": { "@type": "Answer", "text": "While the rigor may vary based on risk, some level of qualification or verification is generally expected for all equipment used in a regulated environment. A risk-based approach helps determine the extent of IQ/OQ/PQ activities, focusing on critical aspects." } }, { "@type": "Question", "name": "What is the difference between IQ/OQ/PQ and software validation?", "acceptedAnswer": { "@type": "Answer", "text": "IQ/OQ/PQ focuses on the physical installation, operational limits, and consistent performance of equipment and processes. Software validation, while sometimes incorporating similar principles like installation and operational checks, specifically addresses the correctness, reliability, and intended use of software in medical devices or quality system processes, as detailed in FDA guidance like the General Principles of Software Validation." } } ] } ] } --- [ MedTech Terms The authoritative reference ](/) Browse Learn [Latest](/latest) About 1. [Home](/) 2. / 3. [Terms](/terms) 4. / 5. [Quality & Risk](/terms?cat=Quality%20%26%20Risk) 6. / 7. IQ / OQ / PQ [All terms](/terms) Quality & Risk [Quality System](/ecosystems/quality-system)[Manufacturing & Supply](/ecosystems/manufacturing-supply) # IQ / OQ / PQ Installation, Operational, and Performance Qualification - the three stages of equipment and process qualification. Reviewed by [Christian Espinosa, Founder, Blue Goat Cyber](/authors/christian-espinosa) Last reviewed May 5, 2026 ## Definition IQ verifies that equipment is installed per specification; OQ verifies that it operates within defined limits; PQ verifies that the integrated process consistently produces conforming output. Together they support [process validation](/terms/process-validation). What the regulation says The FDA, in its Guidance for Industry [Process Validation](/terms/process-validation): General Principles and Practices, emphasizes that Installation Qualification (IQ), Operational Qualification (OQ), and Performance Qualification (PQ) are key stages in establishing documented evidence that a process will consistently produce a product meeting its predetermined specifications and quality attributes. Similarly, [ISO 13485](/terms/iso-13485):2016, a standard for medical device quality management systems, implicitly requires these qualification steps as part of its clauses on production and service provision, ensuring process control and validation. The EU [MDR](/terms/mdr-reporting) (Regulation (EU) 2017/745) also mandates process validation where the conformity of the product cannot be determined from later inspection and testing, which typically involves IQ, OQ, and PQ activities. ## What this means in practice A well-known shorthand, but the structure varies - software validation and aseptic [process validation](/terms/process-validation) each have their own variants. ## Examples - Performing IQ for a new sterilization autoclave by verifying that it is installed according to the manufacturer's specifications, including utility connections and calibration. - Conducting OQ for a tablet press by challenging its operational limits, such as speed and pressure, to ensure it functions consistently within specified ranges under various conditions. - Executing PQ for a packaging line by running production batches to confirm that the integrated process reliably produces sealed and labeled packages meeting all quality requirements over an extended period. Common pitfalls - • Confusing IQ/OQ/PQ as a one-time event rather than a lifecycle approach that includes re-qualification or continuous monitoring. - • Failing to establish clear acceptance criteria for each qualification stage, leading to ambiguous results or unvalidated processes. - • Not adequately documenting all qualification activities, including deviations and resolutions, which can lead to regulatory non-compliance during audits. - • Applying a generic IQ/OQ/PQ approach without tailoring it to the specific risks and complexities of the process or equipment being validated. - • Underestimating the resources, time, and expertise required to perform thorough and effective IQ/OQ/PQ activities. ## Frequently asked questions When is IQ/OQ/PQ required? IQ/OQ/PQ is typically required for new or modified equipment, processes, and systems that can affect product quality, especially in regulated industries like MedTech. It's crucial for demonstrating conformity to specifications and regulatory requirements. Can IQ/OQ/PQ be skipped for non-critical equipment? What is the difference between IQ/OQ/PQ and software validation? ## Related terms Grouped by theme ### Editor's picks · Hand-selected related concepts [ Manufacturing Process Validation Establishing documented evidence that a process consistently produces conforming output. ](/terms/process-validation)[ Quality & Risk Validation Master Plan(VMP) Top-level document describing the manufacturer's overall approach to qualification and validation activities. ](/terms/validation-master-plan) ### Manufacturing & Supply Chain · From this learning path [ Quality & Risk Biocompatibility Ability of a material to perform with an appropriate host response in a specific application. ](/terms/biocompatibility?from=manufacturing-and-supply-chain)[ Quality & Risk Change Control Formal QMS process for evaluating, approving, and implementing changes that could affect product quality or compliance. ](/terms/change-control?from=manufacturing-and-supply-chain)[ Quality & Risk Nonconformance (NCR)(NCR) Failure of a product, process, or system to meet specified requirements. ](/terms/nonconformance?from=manufacturing-and-supply-chain)[ Quality & Risk Shelf Life Period during which a device remains suitable for its intended use under specified conditions. ](/terms/shelf-life?from=manufacturing-and-supply-chain) ### More in Quality & Risk · Same category [ Quality & Risk CAPA Effectiveness Check Verification step confirming a corrective or preventive action actually fixed the problem. ](/terms/capa-effectiveness)[ Quality & Risk Complaint Handling Process for receiving, evaluating, and responding to device complaints. ](/terms/complaint-handling) Cited by Where this term appears across MedTech Terms. Learning paths (1) - [Manufacturing & Supply Chain](/paths/manufacturing-and-supply-chain)Lesson 2 of 14 Ecosystems (2) - [Quality System](/ecosystems/quality-system) - [Manufacturing & Supply](/ecosystems/manufacturing-supply) ## Primary references 3 sources Link health: 3 verified · last checked 2026-06-20 FDA· 2 MDIC· 1 1. [1 FDA Process Validation Guidance Verified FDA · fda.gov ](https://www.fda.gov/regulatory-information/search-fda-guidance-documents/process-validation-general-principles-and-practices) 2. [2 MDIC Case for Quality Verified MDIC · mdic.org ](https://mdic.org/program/case-for-quality/) 3. [3 FDA - Quality Systems Verified FDA · fda.gov ](https://www.fda.gov/medical-devices/postmarket-requirements-devices/quality-system-qs-regulationmedical-device-good-manufacturing-practices) Inline markers like \[1\] jump to the matching reference above. Sponsor note ### Tying cybersecurity into your QMS? We help align cybersecurity activities with ISO 13485 design controls and ISO 14971 risk management. [Book a 30-minute discovery session](https://go.bluegoatcyber.com/meetings/blue-goat-cyber/discovery-session) - No obligation - Expert-led from minute one - NDA available on request MedTech Terms is a community resource sponsored by [Blue Goat Cyber](https://bluegoatcyber.com). Definitions are independent of any vendor. On this term Category Quality & Risk Sources 3 Updated 5/5/2026 [Compare with another term](/compare?a=iq-oq-pq) Learn in 60 seconds Card Lesson Quiz Installation, Operational, and Performance Qualification - the three stages of equipment and process qualification. - · A well-known shorthand, but the structure varies - software validation and aseptic process validation each have their own variants. - · Together they support process validation. Remember this Watch out: Confusing IQ/OQ/PQ as a one-time event rather than a lifecycle approach that includes re-qualification or continuous monitoring. Related terms - [Process Validation ](/terms/process-validation) - [Validation Master Plan(VMP) ](/terms/validation-master-plan) You may also need Auto-suggested from Quality & Risk and shared keywords. - [Process Capability and Cpk ](/terms/process-capability-cpk) - [Change Control ](/terms/change-control) - [Management Review ](/terms/management-review) - [Production and Process Controls ](/terms/production-process-controls) - [Process Capability (Cp/Cpk) and SPC ](/terms/spc-cpk) - [Design Controls ](/terms/design-controls) [All Quality & Risk terms](/terms?cat=Quality%20%26%20Risk) From the Blue Goat network Related resources and services on this topic. - [ MedTech Truths Common misconceptions about medical device development - debunked. ](https://mdcmisconceptions.com) MedTech Terms An authoritative, plain-language reference for the regulatory, quality, cybersecurity, and software terms that shape modern medical devices. 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