Process Validation

IQ, OQ & PQ Validation as Part of a Regulatory Imperative (ISO 13485)

Project Manager Responsibilities

As a project manager, I am responsible for the entire validation process. This includes:

  • Forming the validation team.
  • Defining parameters and identifying processes.
  • Creating the Validation Master Plan.
  • Specifying process parameters and outputs.
  • Assisting QA in selecting inspection methods.
  • Conducting design reviews for DQ.
  • Creating and approving protocols.
  • Conducting hands-on IQ, OQ, and PQ.
  • Assisting QA in preparing the final report.
  • Collaborating with production to control and monitor the process.

Validating an Injection Mold

  • Mold certification
  • Dry cycle mold
  • Process stability test
  • Gage repeatability & reproducibility (R&R) test
  • Mold viscosity test
  • Balance of fill analysis
  • Gate freeze test
  • Design of experiments (DOE)
  • Commissioning (multi-cavity analysis)
  • Qualification (process capability study)
  • Verification (30-day run)

Understanding IQ, OQ, and PQ for Medical Device Manufacturing Processes

Process validation aims to produce a stable manufacturing process for medical devices that consistently performs as expected, with minimal and predictable variation. The Process Validation Plan (PVP) outlines the framework for three key validation phases: IQ, OQ, and PQ.

Installation Qualification (IQ)

IQ ensures everything is installed correctly. This includes:

  • Checking equipment, piping, services, and instrumentation against engineering drawings and specifications.
  • Reviewing and authorizing protocols, documentation, and procedures.
  • Verifying installation of components, equipment, software, SOPs, and records.

There should be a documented standard installation procedure for each system, and IQ must verify that installation meets approved requirements from design and system specifications, manufacturer’s recommendations, and data sheets.

US FDA Requirements for IQ (21 CFR 820.70(g))

  • Maintenance Schedule: Establish and document schedules for equipment maintenance.
  • Inspection: Conduct and document periodic inspections.
  • Adjustment: Ensure limitations or tolerances are visibly posted or accessible.
  • Automated Processes: Validate computers or data processing systems used in production.

Consequences of Improper IQ: Improper IQ can lead to serious issues like incorrect installations, software incompatibility, and equipment damage. IQ helps reduce these risks and ensure compliance.

Design Qualification (DQ)

DQ proves equipment design meets requirements, bridging design and manufacturing stages, and ensuring equipment considerations are included in design controls.

Operational Qualification (OQ)

OQ ensures the process operates correctly under anticipated conditions. It involves:

  • Identifying critical operating parameters.
  • Listing and conducting experiments on critical variables.
  • Verifying specific dynamic attributes across operating ranges.
  • Ensuring acceptance criteria are met.

OQ Process: Start according to plan, reach standard conditions, monitor parameters, test product, and adjust conditions to test key inputs.

Consequences of Improper OQ: Improper OQ can lead to processes that don’t start up correctly or produce non-compliant products.

Performance Qualification (PQ)

PQ is the final validation stage, generating evidence that the process consistently produces acceptable products over time. PQ includes:

  • Testing the process as a whole.
  • Ensuring operational test data meet predetermined criteria.

PQ Protocol Elements:

  • Process description.
  • Duration and standard operating parameters.
  • Acceptance criteria.
  • Performance indicators.
  • Test procedures and data collection.
  • Handling abnormal data and resolution procedures.

PQ Report: The report will include protocol adherence, data references, conclusions, and follow-up activities.

Checklist for PQ:

  • Defined product characteristics and process parameters.
  • Established and maintained SOP.
  • Trained operators.
  • Monitoring methods.
  • Mechanisms for evaluating process changes and deviations.
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