are in place and functional. Verify that mixing blades, motors, and belts are secure and undamaged.

Document the pre-operation inspection in the equipment logbook.

4.1.2 Setup for Mixing

• Select the appropriate mixing vessel and ensure it is installed correctly. Confirm that all gaskets and seals are properly fitted to prevent leakage.
• Load the ingredients into the mixing vessel according to the formulation batch record (BMR). Close the vessel securely and ensure the lid is locked.
• Set the mixing parameters, such as speed, time, and temperature (if applicable), based on the formulation’s requirements. Record these settings in the BMR.

4.1.3 Mixing Procedure

• Start the mixer and monitor the operation periodically to ensure proper mixing. Avoid over-mixing to prevent ingredient degradation.
• After mixing is complete, stop the machine, unlock the vessel, and carefully remove the mixed product.
• Record the actual mixing time and speed in the BMR.

4.2 Cleaning of Mixing Equipment

4.2.1 Cleaning Procedure

• Disassemble any removable parts of the mixing equipment, such as blades, seals, and vessels, and inspect them for residue.
• Use an approved cleaning agent to clean all parts of the mixing equipment. For food-grade or pharmaceutical applications, use validated cleaning solutions to avoid contamination.
• Rinse thoroughly with water and dry using lint-free wipes. Avoid air drying, as this may introduce particulate contamination.
• Reassemble the mixing equipment and inspect for cleanliness. Document the cleaning process in the cleaning log.

4.2.2 Final Cleaning Verification

• Perform a final visual inspection of the equipment to verify cleanliness. If necessary, conduct swab tests to ensure no microbial or chemical residue remains.
• Document the final cleaning verification in the cleaning log, and notify QA for approval before reuse.

4.3 Maintenance of Mixing Equipment

4.3.1 Routine Maintenance

• Inspect the mixing equipment weekly for wear and tear, including belts, motors, and mixing blades. Lubricate moving parts as needed according to the manufacturer’s recommendations.
• Check for unusual vibrations or noise during operation. If any issues are found, inform the maintenance team immediately.
• Record routine maintenance activities in the maintenance log.

4.3.2 Annual Calibration and Servicing

• Schedule annual calibration of mixing speeds and temperatures to ensure accurate performance. Document the calibration results in the equipment calibration log.
• Perform a complete system check annually, including electrical connections, motor integrity, and vessel sealing. If repairs are necessary, ensure that all work is logged, and the equipment is tagged with the calibration date.

5) Abbreviations, if any

• BMR: Batch Manufacturing Record
• QA: Quality Assurance

6) Documents, if any

• Equipment Logbook
• Cleaning Log
• Maintenance Log
• Equipment Calibration Log

7) References, if any

• Manufacturer’s equipment manual
• Internal SOP for cleaning validation

8) SOP Version

Version 1.0

Annexure

1. Cleaning Log Template

Date	Equipment ID	Cleaning Agent	Operator Initials	QA Approval
DD/MM/YYYY	Equipment Name	Cleaning Solution Used	Operator Name	QA Name

2. Maintenance Log Template

Date	Equipment ID	Maintenance Description	Operator Initials	QA Approval
DD/MM/YYYY	Equipment Name	Description of Maintenance Performed	Operator Name	QA Name

3. Equipment Calibration Log Template

Date	Equipment ID	Calibration Method	Calibration Results	Operator Initials	QA Approval
DD/MM/YYYY	Equipment Name	Calibration Method	Pass/Fail	Operator Name	QA Name