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Manufacturing downtime statistics 2026: the true cost of unplanned stops
Downtime is the largest single OEE loss in most plants. Here are the numbers that quantify it — and what they imply.
How much does manufacturing downtime cost?
Widely cited industry research puts unplanned downtime costs at roughly $50k–$260k per hour depending on sector, with automotive assembly lines reported far higher (over $1M/hour in the most-cited analyses). Siemens' Senseye research series estimated the Fortune Global 500's unplanned downtime bill at around 11% of yearly revenues — on the order of $1.4 trillion. Exact figures vary by study; the consistent finding is that most plants underestimate their own number because minor stops are never logged.
How much production time do plants actually lose?
Typical measured OEE of 55–65% implies plants lose roughly a third of planned production time to availability and performance losses combined. Surveys consistently find manufacturers experience unplanned outages many hours per month per critical asset, and that a majority cannot state their true downtime cost per hour.
What causes the most unplanned downtime?
- Equipment failure — the classic breakdown, concentrated on a plant's oldest constraint machines
- Changeover overruns — planned stops that run long, rarely logged as losses
- Micro-stops — sub-minute jams and sensor faults; individually trivial, collectively often the #1 hidden loss
- Material & operator waiting — upstream logistics starving the line
Downtime and OEE: the measurement problem
Downtime enters OEE through Availability — and it is the component with the biggest gap between logged and real. Instrumented studies routinely find manual downtime logs capture only 60–80% of actual stop time. That is why every credible downtime-reduction programme starts with automatic stop capture, not with a maintenance initiative.
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Frequently asked questions
What is the average cost of manufacturing downtime?
Commonly cited research ranges from about $50k to $260k per hour depending on industry, with automotive reported above $1M/hour. Most plants have never calculated their own figure.
How much downtime is normal in manufacturing?
With typical OEE at 55–65%, plants effectively lose about a third of planned production time to downtime and speed losses combined.
What is the biggest cause of unplanned downtime?
Equipment failure is the largest visible cause; accumulated micro-stops are usually the largest invisible one — they rarely appear in manual logs.
How do you reduce manufacturing downtime?
Measure automatically first (manual logs miss 20–40% of stop time), classify losses to root cause, then target the top loss with maintenance or SMED actions.