zero defect
**Zero Defect Goal** is a quality philosophy targeting the complete elimination of defects through prevention rather than detection, emphasizing "do it right the first time."
## What Is the Zero Defect Goal?
- **Origin**: Philip Crosby, 1960s quality movement
- **Principle**: Defects are unacceptable, not inevitable
- **Focus**: Prevention systems over inspection
- **Measurement**: Cost of quality (COQ) as key metric
## Why Zero Defect Matters
In semiconductor manufacturing, even 0.1% defect rates translate to thousands of failed chips. Zero defect mindset drives continuous improvement.
```
Defect Cost Escalation:
Stage | Cost to Fix
----------------|-------------
Design | $1
Wafer Fab | $10
Test | $100
Assembly | $1,000
Field Return | $10,000+
Prevention at design = 10,000× savings vs. field fix
```
**Zero Defect Implementation**:
- Define requirements precisely (no ambiguity)
- Build prevention into processes (poka-yoke)
- Measure and track defects obsessively
- Root cause analysis for every defect
- Continuous process improvement (Kaizen)