OEE & Downtime in Machinery & Fabrication
Key takeaways
- High-mix machinery and fabrication shops often run 50 to 70 percent OEE.
- Setup and waiting dominate, often more than actual cutting time.
- The big levers: setup reduction, tooling, and keeping jobs fed.
- Track utilization (TEEP) too, because idle and unscheduled time is large.
Machinery, equipment and metal fabrication is the world of high-mix, low-volume work: many part numbers, small batches, skilled labour. Here the machine spends a surprising amount of time not cutting, waiting for setup, material, tooling or a program. That makes this OEE profile all about availability, not speed.
What's a good OEE in machinery/fabrication?
High-mix shops commonly run 50 to 70 percent OEE, but the headline understates it because so much time goes to setup and waiting. The biggest separator is setup time, and it is worth tracking TEEP too, since machines are often idle or unscheduled. Calculate your OEE.
The biggest losses in machinery & fabrication
| Loss | Why it's big in fabrication | OEE factor |
|---|---|---|
| Setup & changeover | Every small batch needs a setup; in high-mix it can exceed cutting time | Availability |
| Waiting (material / tooling / program) | Jobs stall waiting for the next input, fixture or NC program | Availability |
| Tool changes & breakage | Tool wear, breakage and indexing stop the cut, see CNC troubleshooting | Performance / Availability |
| Reduced speed | Conservative feeds and speeds to protect tools and finish | Performance |
| Rework & scrap | First-off errors and out-of-tolerance parts | Quality |
In high-mix shops, TEEP reveals idle, sellable capacity you already own.
What downtime costs in fabrication
Capacity is the constraint and skilled labour is expensive, so a machine waiting for setup or material is lost margin and a delayed order. Quoting accuracy and on-time delivery both depend on uptime. Estimate your downtime cost.
How leading shops improve
- Attack setup time with SMED, offline preparation and standard work, the single biggest lever.
- Stage material, tooling and programs so the machine never waits.
- Track tool life and reliability (MTBF/MTTR) to cut surprise stops.
The partner we recommend, , reads stops from the machine and shows the true cause on video, then routes a work order, turning setup and waiting losses into a fix list. It is EU-built with EU data residency and holds ISO 27001 / 20000-1 / 9001 (supports audit-readiness). Fabrico is a partner we recommend; the tools here are free regardless.
Is OEE useful in a job shop?
Yes, but pair it with setup time and TEEP. In high-mix work the biggest story is how much time is setup and waiting versus actual cutting.
What is the fastest win?
Setup reduction, almost always. Offline preparation and SMED free real capacity without buying machines. See the six big losses.
Does this cover welding and assembly?
Yes, the setup-and-waiting dynamic carries across fabrication. See welding troubleshooting and CNC.
Common equipment to troubleshoot: CNC machines · Welding · Lathes · Surface grinders · EDM machines · Press brakes · full directory