meet the required specifications and ensuring compliance with GMP guidelines.

4. Accountability

The Maintenance Supervisor is accountable for performing and overseeing the calibration and validation of mixing blades, while the Production Supervisor is responsible for ensuring that the blades are used according to the specifications. The QC Manager ensures the process is compliant with GMP and that all records are accurately maintained.

5. Procedure

5.1 Pre-Calibrating Checks

1. Before calibration, ensure that the mixing blades are properly cleaned and free from any product residue or contaminants. Follow the cleaning SOP for the specific mixing equipment used.
2. Inspect the blades for any signs of wear or damage. Any blades that are damaged or excessively worn should be replaced before calibration or use in production.
3. Ensure that the mixing equipment is correctly installed and securely mounted to prevent any movement during calibration.
4. Verify that all necessary calibration tools and instruments (e.g., calibration gauges, sensors) are available and properly calibrated themselves. This includes ensuring that any temperature, speed, or pressure sensors associated with the mixing system are functioning correctly.

5.2 Calibration Procedure

1. Start the mixing equipment and allow it to reach the desired operating conditions (e.g., temperature, speed). For batch processes, ensure the equipment is at the specified operating temperature before initiating the calibration.
2. Using the appropriate calibration instruments, measure the performance of the mixing blades according to the manufacturer’s specifications. This includes measuring the speed, rotation, and efficiency of the mixing action.
3. If the mixing speed or other parameters deviate from the specifications, adjust the equipment settings until they align with the required values. This may include adjusting the motor speed, blade angle, or operational time.
4. Perform the calibration check at multiple points to ensure consistent performance across the entire range of the mixing process.
5. After adjusting the equipment, verify that all parameters are within the specified range. Record the calibration results in the Mixing Blade Calibration Log (Annexure-1). Include any deviations from the specified values and corrective actions taken.

5.3 Validation Procedure

1. After calibration, validate the performance of the mixing blades by conducting a batch test. Prepare a test batch using a standard formulation and monitor the mixing process.
2. Ensure that the batch is mixed uniformly and that there are no areas with unblended ingredients or clumping. Check the texture, viscosity, and other quality attributes of the final product to confirm that it meets specifications.
3. Perform random sampling from the batch to verify that the mixing process has achieved the desired consistency. Record the results of the sampling in the Mixing Blade Validation Log (Annexure-2).
4. If any inconsistencies are found in the batch, stop the process immediately and investigate the cause. If necessary, adjust the equipment settings, clean the equipment, or replace worn components before continuing the production run.
5. Once the validation results are satisfactory, document the final results in the Validation Report and sign off the process. Ensure the report is reviewed by the QC team.

5.4 Post-Calibrating and Post-Validating Checks

1. After calibration and validation, ensure that all components are securely fastened and that no loose parts could cause operational issues during production.
2. Record all calibration and validation results in the appropriate logs (Annexure-1 and Annexure-2) for future reference and audits.
3. Return the mixing blades to production once they have been properly calibrated and validated. Perform a final inspection before starting production to ensure that the blades are in optimal condition.

5.5 Documentation and Record-Keeping

1. Maintain complete and accurate records of all calibration and validation activities. Ensure that the Mixing Blade Calibration Log (Annexure-1), Mixing Blade Validation Log (Annexure-2), and any other relevant documentation are filled out correctly and stored securely.
2. Ensure that records are reviewed by the Quality Assurance (QA) team to verify that calibration and validation activities comply with GMP standards.
3. Retain all records for a minimum of two years or as required by regulatory guidelines.

6. Abbreviations

• GMP: Good Manufacturing Practices
• QC: Quality Control
• QA: Quality Assurance
• PPE: Personal Protective Equipment

7. Documents

1. Annexure-1: Mixing Blade Calibration Log
2. Annexure-2: Mixing Blade Validation Log

8. References

• Good Manufacturing Practices (GMP) Guidelines – 21 CFR Part 211
• International Conference on Harmonisation (ICH) Q7 – Good Manufacturing Practice for Active Pharmaceutical Ingredients
• Manufacturer’s Manual for Mixing Equipment

9. SOP Version

Version: 2.0

10. Approval Section

	Prepared By	Checked By	Approved By
Signature
Date
Name
Designation
Department

11. Annexures

Annexure-1: Mixing Blade Calibration Log

Batch Number	Calibration Date	Calibration Method	Calibration Results	Operator
12345	20/01/2026	Speed and Efficiency Test	Pass	John Doe

Annexure-2: Mixing Blade Validation Log

Batch Number	Validation Date	Validation Method	Validation Results	Operator
12345	21/01/2026	Batch Testing and Sampling	Pass	Jane Smith

Revision History:

Revision Date	Revision No.	Revision Details	Reason for Revision	Approved By
01/03/2024	1.0	Initial Version	New SOP Creation	QA Head
01/03/2025	2.0	Format Revision and Updates	Standardization of Document	QA Head