Super Hot Lot

Super hot lot is the highest-priority dispatch class reserved for urgent lots that must preempt normal scheduling flow - it is used sparingly for mission-critical customer commitments or fab-recovery diagnostics.

What Is Super hot lot?

• Definition: Special lot category with top dispatch rank above standard hot-lot and normal production classes.
• Operational Privileges: Queue bypass, immediate transport preference, and setup preemption at eligible tools.
• Typical Use Cases: Fab-down root-cause samples, executive-priority customer prototypes, and severe delivery recovery cases.
• Governance Need: Requires strict approval workflow to prevent overuse and priority inflation.

Why Super hot lot Matters

• Urgency Response: Provides a controlled mechanism for handling exceptional business-critical situations.
• Recovery Acceleration: Speeds diagnostic cycles during major process or equipment incidents.
• Delivery Protection: Helps recover specific high-impact commitments under constrained capacity.
• System Tradeoff: Frequent super-hot overrides can degrade overall fab flow and increase tail cycle time.
• Policy Integrity: Strong controls are needed to keep priority classes meaningful and effective.

How It Is Used in Practice

• Approval Controls: Require high-level authorization with documented business and technical justification.
• Execution Limits: Cap active super-hot volume as a percentage of total WIP.
• Impact Monitoring: Track collateral delay to standard lots and adjust policy thresholds accordingly.

Super hot lot is a necessary but high-cost scheduling exception - disciplined, limited use preserves urgent-response capability without destabilizing overall production performance.