Validation Plans-User Requirements Specification (URS)
What It Is:
The URS is the foundation of the validation process. It defines the functional and operational requirements the equipment must meet to fulfil its intended purpose.
Purpose:
- Capture the operational goals and user needs for the equipment.
- Provide a benchmark for design, testing, and acceptance criteria.
- Ensure alignment with regulatory standards like GMP, ATEX, or ISO.
Key Activities:
- Defining Requirements: Specify operational needs (e.g., tablet press throughput, tablet size range).
- Compliance Specifications: Identify applicable regulations (e.g., GMP for pharmaceutical manufacturing).
- Stakeholder Input: Collaborate with end users, quality assurance, and engineering teams.
- Drafting Performance Criteria: Include quantitative metrics, such as:
- Throughput: “The press must produce 200,000 tablets/hour.”
- Accuracy: “Weight tolerance must remain within ±2%.”
- Environmental conditions: “Operational between 15°C and 25°C.”
Writing Guidance:
- Use concise, non-technical language for clarity.
- Organise into sections (e.g., functional needs, performance criteria, compliance requirements).
- Use tables or bullet points for measurable parameters.
Accompanying Documentation:
- Stakeholder sign-off sheets.
- A traceability matrix linking URS to later validation stages.
Example for a Tablet Press:
“The press must produce 200,000 tablets/hour with a weight tolerance of ±2% and meet GMP requirements for cleanroom use.”
Validation Plans- Functional Specification (FS) and Design Qualification (DQ)
What It Is:
The FS translates the URS into technical specifications for the equipment. The DQ verifies that the equipment design aligns with the FS.
Purpose:
- Ensure the system’s design can meet user and operational requirements.
- Serve as a blueprint for manufacturing, testing, and installation.
Key Activities:
- Functional Specification Development:
- Detail system features (e.g., control systems, dimensions, materials).
- Specify critical components (e.g., compression dies, feeders, sensors).
- Specify interfaces with other systems (e.g., SCADA, PLCs).
- Design Qualification:
- Evaluate drawings and design documents against the FS.
- Conduct risk assessments for critical design elements.
- Verify materials, layouts, and construction methods.
Writing Guidance:
- FS: Include schematics, control descriptions, and critical features. Tip: break down functional requirements by subsystems (e.g., mixing blades, control panels) and specify measurable parameters, such as rotational speed or operating pressure.
- DQ: Summarise design evaluation outcomes and align them with the FS. Tip: include a checklist comparing design features against URS/FS and document any design review meetings and approvals to include.
Accompanying Documentation:
- Detailed schematics and engineering drawings.
- Risk assessment reports.
Example for a Tablet Press:
“The press must feature a PLC system with touchscreen controls and stainless steel construction for GMP compliance. Compression force sensors should operate within 10-50 kN.”
Validation Plans- Factory Acceptance Testing (FAT)
What It Is:
The FAT is performed at the supplier’s site to verify equipment functionality before delivery. These tests confirm the system operates as specified in the FS and helps to identify/resolve any issues before installation. Read our guide to writing FAT documentation here.
Key Activities:
- Test Preparation: Develop FAT protocols detailing test steps and acceptance criteria.
- Execution: Test critical functions, such as weight uniformity, operational speed and load capacity.
- Documentation: Record results and deviations in test reports.
Writing Guidance:
- Define specific test steps and expected outcomes (e.g., “Verify that compression force sensors function between 10-50 kN”).
- Include checklists for physical inspections/ system tests and pass/fail criteria for each test.
Accompanying Documentation:
- FAT protocol and results report.
- Supplier compliance certificates.
Example for a Tablet Press:
“Test tablet production speed at 200,000 tablets/hour and verify weight uniformity within ±2% tolerance.”
Validation Plans- Site Acceptance Testing (SAT)
What It Is:
The SAT is conducted at the installation site to confirm proper operation under site-specific conditions after installation. For example, testing the equipment’s integration with local systems, such as SCADA or PLCs. Read our guide on SAT documentation here.
Key Activities:
- Pre-Requisites: Confirm calibration of site utilities (e.g., power supply, HVAC systems).
- Testing: Repeat FAT tests under real site conditions and verify new parameters (e.g., noise levels in production environments or safety features, including emergency stops and guards, function properly).
- Documentation: Record site-specific test results and deviations.
Writing Guidance:
- Build on the FAT protocol, adding site-specific parameters (again detail test scripts with clear, step-by-step instructions and expected results).
- Include test prerequisites, such as utility checks.
- Include checklists for integration with site systems and safety compliance.
Accompanying Documentation:
- SAT protocols.
- Calibration records for site utilities.
Example for a Tablet Press:
“Verify the press produces 200,000 tablets/hour achieved in the FAT under site cleanroom pressure differential of 10-15 Pa.”
Validation Plans- Installation Qualification (IQ)
What It Is:
The IQ verifies that the equipment is installed correctly according to manufacturer specifications and site requirements (meaning it’s ready for further validation).
Key Activities:
- Verification Checks: Confirm equipment positioning, piping, and instrumentation is installed per manufacturer specifications/Check utility connections (e.g., power, water, compressed air)/Verify environmental conditions, such as humidity or ventilation.
- Documentation: Complete P&ID walkdowns and ensure tags match drawings.
Writing Guidance:
- Include a pre-installation checklist for site readiness.
- Include step-by-step verification instructions (e.g., “Check that all bolts are secured and piping connections meet specifications.”).
- Use pre-populated checksheets for consistency.
- Tip: List critical installation tests, such as connection tightness and system levelling.
Accompanying Documentation:
- P&ID diagrams.
- Installation checksheets.
Example for a Tablet Press:
“Confirm alignment of compression rollers with manufacturer specifications and ensure power connections meet 240V requirement.”
Validation Plans- Operational Qualification (OQ)
What It Is:
The OQ tests equipment performance under simulated operating conditions to confirm it meets the pre-defined parameters. Ideally this step is to identify any potential issues before production use.
Key Activities:
- Performance Testing: Test operational parameters (e.g., max load, continuous operation).
- Failure Mode Analysis: Assess system behaviour under stress conditions, validate alarms, sensors, and control settings.
“Test feeder speed variability from 5-20 rpm and confirm consistent output at all settings.”
Writing Guidance:
To ensure thorough validation, define and document each test protocol with clarity.
- Specific Test Protocols: Define specific test protocols for each operational parameter, such as feeder speed, compression force, or tablet weight. This ensures that each parameter is systematically tested for compliance.
- Detailed Test Scripts: Include detailed test scripts that outline the steps of the test, alongside expected and actual results. This provides a clear comparison of performance versus expectations.
- Acceptance Criteria: Specify acceptance criteria for each parameter to determine whether the system is operating within the defined limits. These criteria serve as benchmarks for passing or failing the test.
Accompanying Documentation:
- OQ Protocols and Results: Keep records of OQ protocols and the results from all tests conducted. These should include test conditions, outcomes, and any deviations observed.
- Calibration Certificates for Test Instruments: Ensure calibration certificates are available for all test instruments used during OQ. This verifies that the equipment used is accurate and reliable.
Example for a Tablet Press:
“Test feeder speed variability from 5-20 rpm and confirm consistent output at all settings, ensuring uniformity in tablet production.”
By carefully detailing these elements, manufacturers can ensure that their systems are tested comprehensively, maintaining quality and compliance throughout the operational phase.
Validation Plans- Performance Qualification (PQ)
What It Is:
The PQ validates the system under actual production conditions ensuring the equipment consistently delivers results. Firstly, run the equipment under standard production conditions and then evaluate product output against quality benchmarks.
Key Activities:
- Production Testing: Run batches to evaluate performance metrics (e.g., weight uniformity).
- Process Monitoring: Record data on key parameters and variability.
Writing Guidance:
- Include real-world operating scenarios in protocols.
- Define a sampling plan for production runs.
- Document results with statistical analyses of performance metrics.
Accompanying Documentation:
- Batch production records.
- Process monitoring logs.
Example for a Tablet Press:
“Produce 1,000,000 tablets over eight hours and ensure weight variance remains within ±2%.”
Validation Plans- Process Validation
What It Is:
Process validation is essential for ensuring consistent quality across the lifecycle of a system. Importantly, it not only guarantees long-term process stability but also connects validation activities with ongoing monitoring and scheduled re-validation efforts. This establishes a reliable foundation for sustained product quality.
Key Activities:
- Validation Batches: Initially, test three consecutive batches under standard operating conditions. This step ensures that the system operates consistently, and all operational data should be carefully recorded throughout the process.
- Ongoing Monitoring: In addition, establish a routine monitoring system for tracking process variability. Key variables such as temperature, speed, or pressure should be closely observed to ensure stability over time.
Writing Guidance:
- Clear Acceptance Criteria: Ensure that batch acceptance criteria are explicitly defined and detailed. This helps assess whether each batch meets the required specifications.
- Document Re-validation and Monitoring Procedures: Be sure to document procedures for re-validation and outline the necessary ongoing checks. Tip: Statistical methods should be included to analyse process variability, enhancing the reliability of the data and facilitating better decision-making.
Accompanying Documentation:
- Process Validation Reports: Provide detailed reports summarising the findings from each validation batch.
- Monitoring Schedules and Results: Additionally, include comprehensive schedules and results from ongoing monitoring, which will provide a track record of process stability and performance.
Example for a Tablet Press:
“Validate the process by running three batches at 200,000 tablets/hour, achieving 98% uniformity and 0.5% defect rate.”
By following these steps, manufacturers can establish a reliable process that ensures high product quality and supports long-term operational stability.
This section lays a detailed roadmap for each stage of validation, emphasising precision and compliance in documenting activities. Transitioning next, we explore the development and writing of the master validation plan itself.