Situation
A site adds a new product strength to an existing manufacturing execution system (MES) recipe. Equipment is unchanged, but material rules, set-point limits, and exception routing are configured locally.
Intended Use
Guide authorized operators through dispensing and processing, prevent use of incorrect material, enforce approved parameter ranges, and create the electronic batch record used for review.
Decision Summary
| Decision element | Case record |
|---|---|
| GxP assessment | Material identity, processing limits, exception routing, operator authorization, and the resulting batch record directly support controlled manufacturing and batch review. |
| Potential impact | Product can be manufactured with an incorrect material or parameter and the batch record can misrepresent the executed process. |
| Known issue | A fictional boundary execution accepts the upper limit after unit conversion because rounding occurs too early. |
| Validation conclusion | Release is withheld until conversion precision is corrected and the affected limits, exception route, and record output pass regression. |
GxP Assessment
Material identity, processing limits, exception routing, operator authorization, and the resulting batch record directly support controlled manufacturing and batch review.
Affected GxP Functions
- Recipe version and product selection
- Material and status verification
- Set-point and tolerance limits
- Exception routing and e-signature
- Electronic batch record generation
Failure Scenarios
- Wrong recipe version is selected
- An unapproved material is accepted
- A set point outside the approved range is permitted
- An exception bypasses required Quality review
- The record omits the executed recipe revision
Potential Impact
Product can be manufactured with an incorrect material or parameter and the batch record can misrepresent the executed process.
Existing Controls
- Approved master recipe
- Barcode material verification
- Role restrictions
- Independent batch-record review
- Equipment alarms
Existing Evidence
- Prior qualified MES platform
- Supplier standard-function regression
- Approved configuration specification
- Previous recipe tests
Evidence Gaps
- New strength and limits
- Legacy material-status combination
- Open exception during version activation
- Record display of recipe revision
Testing Approach
- Script exact material and parameter controls at boundaries
- Challenge unauthorized role and bypass paths
- Explore interruption and open-exception transition
- Verify audit history, signatures, and executed-record output
Deviations or Known Issues
A fictional boundary execution accepts the upper limit after unit conversion because rounding occurs too early.
Validation Conclusion
Release is withheld until conversion precision is corrected and the affected limits, exception route, and record output pass regression.
Reassessment Criteria
- Recipe or calculation change
- Material-master interface change
- MES platform release
- Exception or signature workflow change
- Related manufacturing deviation