Standard Operating Procedure for Comparative Evaluation of Transferred Methods in Analytical Method Development
| Department | Analytical Method Development |
|---|---|
| SOP No. | SOP/AMD/299/2025 |
| Supersedes | SOP/AMD/299/2022 |
| Page No. | Page 1 of 10 |
| Issue Date | 21/05/2025 |
| Effective Date | 23/05/2025 |
| Review Date | 21/05/2026 |
1. Purpose
To define a structured procedure for conducting comparative evaluations of analytical methods following their transfer between laboratories to confirm reproducibility, accuracy, and equivalency across units.
2. Scope
This SOP applies to all transferred analytical methods for
3. Responsibilities
- Sending Unit (SU): Provides validated method, training, and reference standards.
- Receiving Unit (RU): Executes transferred method on designated samples and documents results.
- QA Department: Verifies data integrity, approves final comparative evaluation reports.
4. Accountability
The Head of Analytical Method Development is accountable for ensuring that transferred methods maintain their validated performance across laboratories through comparative evaluations.
5. Procedure
5.1 Sample Selection and Testing
- Select at least three commercial or development batches of the product.
- Analyze all samples at both SU and RU using the same method, reagents, and reference standards.
- Perform analysis in triplicate at each site and ensure system suitability is met at both ends.
5.2 Parameters for Comparison
- Assay (% label claim)
- Impurity profiling
- Related substances
- Dissolution profile, if applicable
5.3 Acceptance Criteria
- Assay: Difference between SU and RU mean values ≤ 2.0%
- Impurities: Difference ≤ 20% per impurity level
- RSD (both sites): NMT 2.0% for assay and impurities
- System Suitability: Must meet method-specific criteria at both labs
5.4 Statistical Analysis
- Calculate % difference between SU and RU results.
- Perform paired t-test (95% confidence level) for assay and key impurity values.
- Assess correlation coefficient (r ≥ 0.98) to establish analytical agreement.
5.5 Documentation and Reporting
- Summarize data in a Comparative Evaluation Report (Annexure-3).
- Include:
- Raw data and chromatograms
- System suitability logs
- Deviation records (if any)
- Statistical comparison summary
- QA to approve and archive the final report.
6. Abbreviations
- SU: Sending Unit
- RU: Receiving Unit
- QA: Quality Assurance
- RSD: Relative Standard Deviation
- CTL: Contract Testing Laboratory
7. Documents
- Comparative Testing Raw Data Sheet – Annexure-1
- Statistical Summary Worksheet – Annexure-2
- Comparative Evaluation Report – Annexure-3
8. References
- ICH Q2(R1): Validation of Analytical Procedures
- WHO TRS 957: Analytical Transfer Guidelines
- FDA: Analytical Procedures and Method Validation
9. SOP Version
Version: 2.0
10. Approval Section
| Prepared By | Checked By | Approved By | |
|---|---|---|---|
| Signature | |||
| Date | |||
| Name | Kiran Sharma | Dr. Preeti Nair | Sunita Reddy |
| Designation | QC Analyst | QA Reviewer | Head – AMD |
| Department | Analytical Method Development | QA | Analytical Method Development |
11. Annexures
Annexure-1: Comparative Testing Raw Data Sheet
| Sample ID | Assay (SU) | Assay (RU) | Difference (%) | Status |
|---|---|---|---|---|
| COM/299/01 | 98.5% | 98.9% | +0.4% | Pass |
Annexure-2: Statistical Summary Worksheet
Paired t-test p-value = 0.186 (NS), r = 0.992. No statistically significant difference between SU and RU methods. Results comparable.
Annexure-3: Comparative Evaluation Report
The transferred HPLC method for assay and related substances of XYZ Tablets was evaluated across SU and RU. Results met all system suitability and analytical equivalence criteria. Method successfully transferred.
Revision History:
| Revision Date | Revision No. | Details | Reason | Approved By |
|---|---|---|---|---|
| 21/05/2025 | 2.0 | Expanded data evaluation and t-test guidance included | Annual SOP Review | Sunita Reddy |
| 14/08/2022 | 1.0 | Initial SOP Release | New SOP | QA Head |