expectations.

2. Scope

This SOP applies to all stages of sterile injectable production, including formulation, solution preparation, filtration, filling, lyophilization, sealing, and packing where Critical Process Parameters are defined and controlled.

3. Responsibilities

• Production Executive: To monitor and record CPPs as per BMR instructions.
• Manufacturing Supervisor: To review CPP logs and escalate deviations.
• QA Officer: To verify data and ensure regulatory compliance.
• Engineering: To calibrate and maintain equipment that monitors CPPs.

4. Accountability

The Head of Manufacturing is accountable for ensuring consistent monitoring and compliance with all CPPs and maintaining documentation integrity.

5. Procedure

5.1 Identification of Critical Process Parameters

1. CPPs are identified during process development and validated during scale-up and commercial production phases.
2. Parameters considered critical include:
   • Temperature and pressure during sterilization
   • Mixing speed and time during formulation
   • Filter integrity during sterilizing filtration
   • Filling volume and plunger pressure
   • Stoppering force and lyophilization chamber pressure
3. CPPs shall be listed and approved in the Master Batch Manufacturing Record (MBMR).

5.2 Equipment Calibration and Qualification

1. All instruments used to monitor CPPs must be calibrated as per the Calibration SOP.
2. Qualification (IQ/OQ/PQ) of process equipment shall be completed prior to monitoring CPPs.

5.3 Monitoring of CPPs

1. CPPs shall be monitored:
   • Manually (e.g., via gauges or meters)
   • Electronically (e.g., SCADA, HMI interfaces)
2. Real-time monitoring should be accompanied by manual confirmation and initialing.
3. Any parameter drifting toward the action or alert limit shall trigger immediate supervisor notification.

5.4 Documentation and Verification

1. All monitored CPPs shall be documented in the CPP Monitoring Log (Annexure-1).
2. Ensure legible, timely entries as per ALCOA+ principles.
3. Logs shall be reviewed and signed by the shift supervisor and countersigned by QA.

5.5 Handling Non-Compliance or Deviations

1. If any CPP exceeds its defined limit:
   • Immediately stop the affected process.
   • Document deviation in Annexure-2: CPP Deviation Report.
   • Inform QA and initiate investigation.
2. Evaluate product impact using QA-QC and production feedback.
3. Batch disposition to be decided based on risk assessment and product quality impact.

5.6 Periodic Trending and Review

1. Monthly CPP performance reviews shall be conducted by Manufacturing and QA.
2. Trends outside the statistical control chart or with repetitive deviations must be escalated to the Quality Risk Management team.
3. Data shall be compiled and discussed in Quality Management Review (QMR) meetings.

6. Abbreviations

• CPP: Critical Process Parameter
• SOP: Standard Operating Procedure
• BMR: Batch Manufacturing Record
• MBMR: Master Batch Manufacturing Record
• HMI: Human Machine Interface
• QMR: Quality Management Review

7. Documents

1. CPP Monitoring Log – Annexure-1
2. CPP Deviation Report – Annexure-2

8. References

• ICH Q8 – Pharmaceutical Development
• ICH Q9 – Quality Risk Management
• 21 CFR Part 211 – Current Good Manufacturing Practice for Finished Pharmaceuticals
• WHO TRS 986 Annex 2 – GMP for Sterile Pharmaceutical Products

9. SOP Version

Version: 2.0

10. Approval Section

	Prepared By	Checked By	Approved By
Signature
Date
Name
Designation	Manufacturing Executive	QA Executive	Head QA
Department	Production	Quality Assurance	Quality Assurance

11. Annexures

Annexure-1: CPP Monitoring Log

Date	Batch No.	Parameter	Set Limit	Observed Value	Initials
24/06/2025	BN-472X	Filling Volume	5.0 mL ± 0.1 mL	5.02 mL	RK

Annexure-2: CPP Deviation Report

Date	Batch No.	CPP	Deviation Description	Action Taken	QA Comments
23/06/2025	BN-471X	Mixing Speed	120 RPM recorded instead of 150 RPM	Mixing repeated, batch placed on hold	Investigation initiated

Revision History:

Revision Date	Revision No.	Details	Reason	Approved By
01/01/2022	1.0	Initial Issue	New SOP	QA Head
24/06/2025	2.0	Added annexures, clarified limits and monitoring systems	Periodic Review	QA Head