yield ramp

**Yield ramp** is the **process of increasing production yield** — the critical phase after product introduction where manufacturing teams systematically improve yield from initial low levels to target production yields. **What Is Yield Ramp?** - **Definition**: Period of rapid yield improvement after product launch. - **Duration**: Typically 6-18 months. - **Goal**: Reach target yield for profitable production. **Ramp Phases**: Introduction (low yield, learning), improvement (rapid gains), maturity (target yield reached). **Improvement Activities**: Defect reduction, process optimization, design fixes, equipment qualification, systematic issue resolution. **Metrics**: Yield vs. time, defect density reduction, Pareto analysis of failures, time to target yield. **Challenges**: Balancing volume and yield, prioritizing improvements, managing customer expectations. **Applications**: Production planning, capacity forecasting, profitability analysis, technology transfer. Yield ramp is **critical to profitability** — the faster yield reaches target, the sooner product becomes profitable.