maintaining data integrity and compliance with ICH, FDA, and WHO guidelines.

2. Scope

This SOP applies to all OOT results identified during the analysis of stability samples, method validation batches, robustness, or reproducibility studies in the Analytical Method Development (AMD) department.

3. Responsibilities

• Analytical Scientist: Identifies OOT result, initiates preliminary check, and notifies supervisor.
• AMD Supervisor: Reviews context of OOT and guides technical investigation.
• QA Representative: Reviews the investigation report, ensures procedural compliance, and participates in CAPA review.

4. Accountability

The Head of AMD is accountable for ensuring that all OOT incidents are appropriately recorded, investigated, and resolved as per regulatory and internal quality requirements.

5. Procedure

5.1 Identification of OOT Results

1. Define OOT as a result that falls within specification limits but shows a notable deviation from historical trends.
2. Compare current data with trend charts, control charts, or historical datasets maintained in the LIMS or Excel-based logs.
3. Use statistical rules (e.g., 2σ or 3σ thresholds) to flag OOT values for further evaluation.

5.2 Preliminary Checks

1. Verify instrument calibration status and qualification logs.
2. Ensure cleanliness and proper functioning of instruments and lab equipment.
3. Check sample preparation records, reagent quality, and analyst’s logbook.
4. If any gross error is identified, document and reanalyze using a new aliquot of the same sample.

5.3 Formal Investigation

1. Initiate a formal OOT investigation form (Annexure-1) if preliminary checks are inconclusive.
2. Assign unique OOT ID for traceability and log in the OOT Register (Annexure-2).
3. Perform Root Cause Analysis (RCA) using tools such as 5 Whys or Fishbone Diagram.
4. Document interview records, retraining if applicable, and repeat analysis if scientifically justified.

5.4 Evaluation of Trend Validity

1. Assess the statistical robustness of the historical data against which the OOT was identified.
2. Recalculate control limits if data sets have changed significantly over time.
3. Perform a batch-to-batch comparison to identify drift patterns or analytical inconsistencies.

5.5 Corrective and Preventive Actions (CAPA)

1. Define and document CAPA in Annexure-3 based on the investigation outcome.
2. Implement actions such as equipment maintenance, analyst retraining, or method revision.
3. Track CAPA effectiveness over a defined observation period (e.g., 30 or 60 days).

5.6 Reporting and Closure

1. Compile the investigation findings in the final OOT Report.
2. Obtain approvals from AMD, QA, and Quality Control (if applicable).
3. Close the OOT case only after CAPA implementation and effectiveness verification.

6. Abbreviations

• OOT: Out-of-Trend
• RCA: Root Cause Analysis
• CAPA: Corrective and Preventive Action
• LIMS: Laboratory Information Management System

7. Documents

1. OOT Investigation Form – Annexure-1
2. OOT Register – Annexure-2
3. CAPA Record – Annexure-3

8. References

• ICH Q10 – Pharmaceutical Quality System
• FDA Guidance on Investigating Out-of-Specification Results
• WHO Technical Report Series 996, Annex 7

9. SOP Version

Version: 2.0

10. Approval Section

	Prepared By	Checked By	Approved By
Signature
Date
Name	Kriti Verma	Alok Rathi	Dr. Harshita Goyal
Designation	AMD Analyst	QA Reviewer	Head – AMD Department
Department	Analytical Method Development	Quality Assurance	Analytical Method Development

11. Annexures

Annexure-1: OOT Investigation Form

Fields include Sample ID, Test Parameter, Expected Range, Observed Value, Analyst Name, Date, Preliminary Check Summary, RCA, CAPA, and Reviewer Comments.

Annexure-2: OOT Register

OOT ID	Date	Sample	Test	OOT Observation	Status
OOT-317-001	01/06/2025	STB-023	Assay	Drop in value by 7% vs. historical	Open

Annexure-3: CAPA Record

Details CAPA assigned, due date, responsible person, and closure remarks post implementation and monitoring period.

Revision History:

Revision Date	Revision No.	Details	Reason	Approved By
01/06/2025	2.0	Enhanced investigation depth, added statistical evaluation	Annual Review Update	Dr. Harshita Goyal
20/07/2022	1.0	Initial SOP Issuance	New SOP	QA Head