Situation
A chromatography data system (CDS) processing method is revised to address peak integration for a new formulation matrix.
Intended Use
Acquire chromatographic data, apply the approved processing method, permit controlled reintegration, calculate results, and retain review evidence.
Decision Summary
| Decision element | Case record |
|---|---|
| GxP assessment | Processing parameters, manual integration, calculation, audit history, review, and reported result support laboratory decisions used for release. |
| Potential impact | An incorrect analytical result can support an incorrect material or product decision. |
| Known issue | A fictional low-area shoulder peak is omitted under one processing threshold. |
| Validation conclusion | The processing method is not approved until threshold rationale, expected result, reviewer instruction, and regression evidence are corrected. |
GxP Assessment
Processing parameters, manual integration, calculation, audit history, review, and reported result support laboratory decisions used for release.
Affected GxP Functions
- Processing-method version
- Peak detection and integration
- Manual reintegration authorization
- Result calculation and report
- Audit-trail review
Failure Scenarios
- Wrong method version is applied
- A reportable peak is excluded
- Unauthorized reintegration changes the result
- Rounding changes specification status
- Audit review misses the change
Potential Impact
An incorrect analytical result can support an incorrect material or product decision.
Existing Controls
- Controlled method approval
- Role restrictions
- Second-person data review
- Audit-trail review procedure
- Instrument suitability
Existing Evidence
- Qualified CDS and instrument
- Prior method validation data
- Supplier calculation tests
- Approved analytical procedure
Evidence Gaps
- New matrix behavior
- Method-version transition
- Manual integration boundaries
- Report rounding
Testing Approach
- Use representative chromatograms with independently established expected results
- Challenge version selection and unauthorized integration
- Test calculation and rounding boundaries
- Verify raw data, method, audit history, report, and review traceability
Deviations or Known Issues
A fictional low-area shoulder peak is omitted under one processing threshold.
Validation Conclusion
The processing method is not approved until threshold rationale, expected result, reviewer instruction, and regression evidence are corrected.
Reassessment Criteria
- Processing-method parameter change
- CDS or integration-engine update
- New matrix or detector
- Review procedure change
- Out-of-specification investigation