Specialised procurement
Once the availability of a part is foreseeably or de facto limited, then other procurement mechanisms come into play.

Procurement strategies

Aftermarket
- Procurement of parts from reliable brokers
- Inspection for authenticity and age before processing (test labs)

Stockpiling, last time buy, long-term storage
- Long-time stockpiling
- Acquisition, appraisal and preservation

Substitution of individual components
- Reengineering for major quantities
- Procurement of reengineered parts from specialised fabs