API Manufacturing: SOP for Internal Audit Planning and Execution – V 2.0
Standard Operating Procedure for Internal Audit Planning and Execution in API Manufacturing
| Department |
API Manufacturing |
| SOP No. |
SOP/API/167/2025 |
| Supersedes |
SOP/API/167/2022 |
| Page No. |
Page 1 of 13 |
| Issue Date |
14/04/2025 |
| Effective Date |
16/04/2025 |
| Review Date |
14/04/2026 |
1. Purpose
To establish a documented system for planning, conducting, documenting, and following up on internal audits within API manufacturing units in order to assess compliance with Good Manufacturing Practices (GMP), internal policies, and regulatory standards.
2. Scope
This SOP applies to all internal audits conducted by the Quality Assurance (QA) department at the API manufacturing facility, covering manufacturing, warehousing, quality
control, engineering, utilities, and support functions.
3. Responsibilities
- QA Department: Prepare audit schedules, assign auditors, conduct audits, document findings, and ensure CAPA closure.
- Auditors: Conduct unbiased evaluations and document observations clearly.
- Auditees (Departments): Facilitate audit process and provide required documents and responses to observations.
- QA Head: Review audit reports and monitor CAPA effectiveness.
4. Accountability
The QA Head is accountable for the successful execution of internal audits and ensuring closure of all observations through timely and effective corrective and preventive actions.
5. Procedure
5.1 Internal Audit Planning
- QA shall prepare an Annual Internal Audit Schedule (Annexure-1) at the beginning of each calendar year.
- Frequency of audits:
- GMP areas – At least once every 6 months
- Support departments – Once annually
- Trigger-based audits – As needed following complaints, deviations, or inspections
5.2 Auditor Selection and Training
- Internal auditors shall be qualified personnel trained in auditing techniques and GMP requirements.
- Auditors must be independent of the area being audited to ensure objectivity.
- Training records of auditors shall be maintained by QA.
5.3 Audit Preparation
- QA shall issue an Internal Audit Intimation (Annexure-2) to the auditee department at least 3 days in advance.
- Audit Checklist (Annexure-3) shall be prepared based on:
- Previous audit observations
- Applicable SOPs, guidelines, and regulatory requirements
- Any specific focus areas
5.4 Conducting the Audit
- The audit shall include:
- Opening meeting with the auditee
- Facility walkthrough and interviews
- Review of documents, records, logs, and equipment
- All observations shall be documented clearly as:
- Critical: Direct impact on product quality/safety or regulatory non-compliance
- Major: Potential to affect product quality or documentation integrity
- Minor: Improvement areas not immediately affecting quality
- Close the audit with an exit meeting and initial discussion on observations.
5.5 Audit Report Preparation
- Complete the Internal Audit Report (Annexure-4) within 5 working days of audit completion.
- Include:
- Audit date and scope
- Auditors and auditees involved
- Observations categorized by severity
- Photos or evidence if applicable
- Distribute the report to department heads and management.
5.6 Corrective and Preventive Action (CAPA)
- Auditee departments shall submit CAPA responses within 10 working days using the CAPA Response Form (Annexure-5).
- QA shall review the adequacy of CAPA and request clarification if required.
- QA shall verify effectiveness of actions implemented and document closure in the Audit CAPA Tracker (Annexure-6).
5.7 Re-Audit and Follow-up
- QA may schedule a re-audit in case of critical observations or ineffective CAPA implementation.
- Follow-up audits shall be documented using a Follow-Up Audit Form (Annexure-7).
5.8 Audit Summary and Trending
- QA shall maintain a Master Audit Summary (Annexure-8) capturing:
- Total audits conducted
- Observation types and recurring issues
- CAPA timelines and closures
- Summarized trends and performance metrics shall be discussed in quarterly Quality Management Review (QMR) meetings.
6. Abbreviations
- QA: Quality Assurance
- CAPA: Corrective and Preventive Action
- GMP: Good Manufacturing Practices
- QMR: Quality Management Review
7. Documents
- Annual Audit Schedule (Annexure-1)
- Audit Intimation Form (Annexure-2)
- Audit Checklist (Annexure-3)
- Internal Audit Report (Annexure-4)
- CAPA Response Form (Annexure-5)
- Audit CAPA Tracker (Annexure-6)
- Follow-Up Audit Form (Annexure-7)
- Master Audit Summary Sheet (Annexure-8)
8. References
- ICH Q10 – Pharmaceutical Quality System
- 21 CFR Part 211.180 – Recordkeeping Requirements
- WHO GMP – Annex 3: Quality Management System
9. SOP Version
Version: 2.0
10. Approval Section
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Prepared By |
Checked By |
Approved By |
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11. Annexures
Annexure-1: Annual Internal Audit Schedule
| Department |
Audit Frequency |
Planned Date |
Status |
| Production |
6 Monthly |
01/03/2025 |
Completed |
Annexure-2: Internal Audit Intimation Form
| Date |
Department |
Audit Scope |
Auditor |
| 28/02/2025 |
QC |
Data Integrity and Instrument Logs |
Rajesh Kumar |
Annexure-3: Audit Checklist
| Audit Area |
Requirement |
Compliant (Y/N) |
Remarks |
| Documentation |
SOPs in place and current |
Y |
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Annexure-4: Internal Audit Report
| Observation No. |
Category |
Description |
Department |
| 01 |
Major |
Incomplete logbook entries |
Production |
Annexure-5: CAPA Response Form
| Observation No. |
Root Cause |
CAPA Proposed |
Target Date |
| 01 |
Staff unaware of SOP changes |
Retraining |
10/03/2025 |
Annexure-6: Audit CAPA Tracker
| CAPA ID |
Status |
Verified By |
Closure Date |
| CAPA/2025/008 |
Closed |
QA |
15/03/2025 |
Annexure-7: Follow-Up Audit Form
| Original Audit Date |
Re-Audit Date |
Findings Closed |
Remarks |
| 01/03/2025 |
10/03/2025 |
Yes |
Effective CAPA |
Annexure-8: Master Audit Summary Sheet
| Audit No. |
Area Audited |
Observations |
CAPA Status |
| INT/2025/03 |
Warehouse |
2 Minor |
Closed |
Revision History:
| Revision Date |
Revision No. |
Details |
Reason |
Approved By |
| 01/01/2022 |
1.0 |
Initial Release |
Implementation |
QA Head |
| 14/04/2025 |
2.0 |
Updated audit classification and annexures |
Compliance Improvement |
QA Head |