Parts Inventory

Parts Inventory Management in semiconductor manufacturing involves maintaining optimal stock levels of spare parts, consumables, and critical equipment components.

## What Is Parts Inventory Management?

  • Scope: Spare parts, consumables, quartz, o-rings, pumps
  • Balance: Too much = capital tied up; too little = extended downtime
  • Systems: MRP/ERP integration, min/max levels, reorder points
  • Strategy: Critical spares on-site, others with fast delivery

## Why Parts Inventory Matters

A $50 o-ring out of stock can cause $100K+ production losses. Smart inventory ensures parts availability without excessive capital investment.

Inventory Criticality Matrix: │ Low Cost │ High Cost────────────────────┼─────────────┼────────────Critical for │ Stock │ Stock 1-2production │ generously │ + supplier │ │ consignment────────────────────┼─────────────┼────────────Non-critical │ Min/max │ Order as │ reorder │ needed────────────────────┴─────────────┴────────────

Best Practices:
- ABC classification (A=critical, C=commodity)
- Lead time monitoring for long-lead items
- Consignment agreements for expensive parts
- Real-time inventory tracking with ERP integration
- Regular cycle counts, not just annual physical

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