cleaning validation program.

2. Scope

This SOP is applicable to the Analytical Method Development (AMD) department for establishing standardized visual cleanliness acceptance criteria and method validation in pharmaceutical production facilities.

3. Responsibilities

• Analytical Scientist: Designs and validates visual inspection methods under standardized lighting and surface conditions.
• QC Analyst: Performs mock visual testing to assess sensitivity and repeatability.
• QA Executive: Reviews validation documentation and approves the method for routine GMP use.

4. Accountability

The Head of Analytical Method Development is accountable for ensuring that the visual inspection method is appropriately validated and that visual criteria are consistently applied during cleaning validation and verification activities.

5. Procedure

5.1 Preparation of Visual Standards

1. Prepare surfaces (e.g., stainless steel coupons) by spiking known quantities of API/excipient solutions and allowing them to dry completely.
2. Prepare reference surfaces with known concentrations of residue (e.g., 1 µg/cm², 10 µg/cm²).
3. Assign numerical or coded reference values to each visual standard.

5.2 Visual Inspection Environment

1. Ensure the inspection area has lighting of at least 300 lux.
2. Use white light (4000–5000 K) and standardized viewing angles (30–45° from the surface).
3. Ensure no reflective glare or shadows obstruct the inspection area.

5.3 Training of Inspectors

1. Train personnel in identifying residues and distinguishing them from surface discoloration, scratches, or stains.
2. Use visual standard panels for sensitivity assessment.
3. Only qualified personnel (visual inspectors) are authorized to conduct visual inspections.

5.4 Inspection Process

1. Post-cleaning, inspect equipment surfaces visually under defined lighting conditions.
2. Observe for any discoloration, spots, residue streaks, or particulate matter.
3. Document observations in the visual inspection log (Annexure-1).

5.5 Validation of Visual Inspection Method

1. Perform limit of detection testing using panels spiked with known residue amounts.
2. Acceptance criteria:
   • Lowest amount visually detected by 90% of trained personnel = Visual Detection Limit (VDL)
   • VDL must be below the calculated MACO equivalent per surface area

5.6 Acceptance Criteria

1. No visible residue, stains, discoloration, or contamination under specified conditions.
2. All cleaning must meet both analytical (e.g., swab/rinse) and visual acceptance limits.

5.7 Documentation

1. Maintain training logs, VDL results, validation summary report, and visual inspection log.
2. Cross-reference with cleaning batch records and analytical results.

6. Abbreviations

• SOP: Standard Operating Procedure
• API: Active Pharmaceutical Ingredient
• MACO: Maximum Allowable Carryover
• VDL: Visual Detection Limit
• GMP: Good Manufacturing Practice

7. Documents

1. Visual Inspection Log – Annexure-1
2. Visual Detection Training Sheet – Annexure-2
3. Visual Method Validation Report – Annexure-3

8. References

• ICH Q7: GMP for Active Pharmaceutical Ingredients
• FDA Guidance: Guide to Inspections – Validation of Cleaning Processes
• ISPE Cleaning Validation Guide

9. SOP Version

Version: 2.0

10. Approval Section

	Prepared By	Checked By	Approved By
Signature
Date
Name	Kiran Bhatt	Alok Sinha	Sunita Reddy
Designation	Validation Officer	QA Reviewer	Head – AMD
Department	Analytical Method Development	QA	Analytical Method Development

11. Annexures

Annexure-1: Visual Inspection Log

Date	Equipment	Surface Area	Observation	Inspector	Status
20/05/2025	Blender	Inner Wall	No visible residue	Rajesh Kumar	Pass

Annexure-2: Visual Detection Training Sheet

Inspector Name	Panel No.	Residue Level (µg/cm²)	Detected?	Remarks
Neha Agarwal	VS-2	10	Yes	Clearly visible

Annexure-3: Visual Method Validation Report

Visual cleanliness inspection method validated using standard reference panels spiked with Metronidazole API. VDL confirmed at 5 µg/cm² with 93% detection accuracy by trained staff. Method suitable for cleaning validation visual inspection program.

Revision History:

Revision Date	Revision No.	Details	Reason	Approved By
21/05/2025	2.0	Included detection limit protocol and lighting standardization	Annual Review and GMP Enhancement	Sunita Reddy
10/04/2022	1.0	Initial SOP Release	New SOP	QA Head