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Start Experiment
trails or Pilot production
- Simple design due to time pressure
or limited statistical analysis techniques.
|
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Regularly check
lot status for holds, issues, split or data analysis
requirements
- time consuming to check daily.
- news distributed or not always available
|
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Reaches WAT &
perform key change parameter analysis, no concerns
- extract time is consuming
not all checks are comprehensive
|
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Restart lots,
modify Yield Roadmap
- Yield Ramp delayed
- Wasted people / material resources
|
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Perform Failure
Analysis to determine a known existing in-line event was root cause!
- Wasted FA effort
- Reactive mode
|
|
Reaches Wafer
Sort and split inconclusive / panic due to low yields
- Alarm / concern
- Analysis distraction
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