01
Problem
Production test data was distributed across stations, making it difficult to analyze yield trends, trace serialized unit history, or support investigations quickly.
02
Constraints
- Data had to remain tied to serialized units and test station context.
- Pass/fail and parametric results needed consistent structure.
- Production teams needed faster yield and defect visibility.
- The system had to support regulated investigation and traceability needs.
03
Engineering Decisions
- Connected test stations to a centralized historian and test-system management structure.
- Standardized pass/fail, parametric, and cycle-count logging.
- Created data flows suitable for yield monitoring and defect Pareto analysis.
- Designed traceability around unit identity and test context.
04
Validation
- Verified data capture for pass/fail and parametric results.
- Confirmed record retrieval by serialized unit.
- Reviewed data consistency across stations and test cases.
05
Risk & Mitigation
- Disconnected data could delay investigations; mitigated with centralized traceability.
- Incomplete records could undermine quality decisions; mitigated through structured logging checks.
- Uncontrolled data changes could affect reliability; mitigated through access and release controls.
06
Outcome
The system improved production visibility and enabled faster retrieval of unit-level test history for quality and manufacturing investigations.