OEE & Downtime in Aerospace & Defense Manufacturing
Key takeaways
- Aerospace machining often runs 40 to 65 percent OEE.
- The big losses: setups, hard-alloy tool wear, and inspection/traceability time.
- Parts are high-value, so a scrapped or reworked part is very expensive.
- Accurate, traceable records support certification and audit-readiness.
Aerospace and defense production is high-mix, low-volume, and unforgiving on quality. Machines cut difficult alloys like titanium and nickel, every part is documented and traceable, and a single scrapped component can be worth a great deal. That gives the OEE profile a heavy availability and quality character, with setup and inspection dominating.
What's a good OEE in aerospace?
Aerospace machining commonly sits at 40 to 65 percent OEE against the 85 percent world-class reference. Much of the gap is setup and inspection that the work genuinely needs; the opportunity is the avoidable part, such as unplanned tool failures and slow changeovers. Calculate your OEE.
The biggest losses in aerospace
| Loss | Why it's big in aerospace | OEE factor |
|---|---|---|
| Setups & changeovers | High-mix, low-volume work means frequent, complex setups | Availability |
| Tool wear & breakage | Titanium and nickel alloys are tough on tools, see CNC troubleshooting | Performance / Availability |
| Inspection & traceability | First-article inspection and documentation pause production | Availability |
| Rework & scrap | Non-conformances on high-value parts are costly | Quality |
| Machine reliability | Complex 5-axis machines need high uptime, see MTBF/MTTR | Availability |
In high-mix machining, TEEP exposes the idle time around setups and inspection.
What downtime costs in aerospace
Parts carry very high value-add and long lead times, so a scrapped component or a late delivery is expensive in both material and schedule. Capacity on certified machines is scarce, which makes every hour of avoidable downtime costly. Estimate your downtime cost.
How leading aerospace shops improve
- Reduce setup time with offline preparation and standard work.
- Predict tool failure to avoid scrapped parts and surprise stops.
- Capture an accurate, traceable record of every stop and cause.
The partner we recommend, , reads stops from the machine and uses computer vision to show the true cause, then routes a work order, giving a time-stamped record that supports audit-readiness. It is EU-built with EU data residency and holds ISO 27001 / 20000-1 / 9001. Fabrico is a partner we recommend; the tools here are free regardless.
Should inspection time count against OEE?
It is required downtime within planned production, so it reduces OEE. The goal is not to cut required inspection, but to reduce avoidable losses around it and keep it efficient.
What is the fastest win?
Usually tool-failure prevention and setup reduction, because both directly free scarce machine capacity. See the six big losses.
Does this cover composites and assembly?
The principles carry across, though the failure modes differ. The setup, inspection and traceability themes are common to most aerospace work.
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