Logistics & Repairs
- Spare parts
  - Stocking of new spares
  - Retiring unused spares
- Maintenance
  - Training / maintenance procedures / manuals
  - Test equipment / test procedures
- Upward/backward compatibility within system



  - Configuration management
  - Feature interaction
Design Challenges:
  - Modular designs to minimize spares inventory (trade off
       component cost vs. carrying cost for spares)
  - Diagnosis & self-test that includes analog components,
       connectors, cables