scrap decision

**Scrap Decision** is **a formal disposition that removes a lot or wafer from production when recovery is not economically or technically justified** - It is a core method in modern semiconductor operations execution workflows. **What Is Scrap Decision?** - **Definition**: a formal disposition that removes a lot or wafer from production when recovery is not economically or technically justified. - **Core Mechanism**: Disposition boards evaluate risk, recovery feasibility, and business impact before terminating flow. - **Operational Scope**: It is applied in semiconductor manufacturing operations to improve traceability, cycle-time control, equipment reliability, and production quality outcomes. - **Failure Modes**: Delayed scrap calls can consume scarce tool time and hide systemic process failures. **Why Scrap Decision Matters** - **Outcome Quality**: Better methods improve decision reliability, efficiency, and measurable impact. - **Risk Management**: Structured controls reduce instability, bias loops, and hidden failure modes. - **Operational Efficiency**: Well-calibrated methods lower rework and accelerate learning cycles. - **Strategic Alignment**: Clear metrics connect technical actions to business and sustainability goals. - **Scalable Deployment**: Robust approaches transfer effectively across domains and operating conditions. **How It Is Used in Practice** - **Method Selection**: Choose approaches by risk profile, implementation complexity, and measurable impact. - **Calibration**: Use clear disposition criteria tied to defect severity, cost, and downstream risk. - **Validation**: Track objective metrics, compliance rates, and operational outcomes through recurring controlled reviews. Scrap Decision is **a high-impact method for resilient semiconductor operations execution** - It protects line capacity by preventing unrecoverable material from consuming production resources.