Somewhere in a factory, a production line has come to a standstill without warning. It wasn’t planned, and nobody saw it coming. According to a 2025 survey by Fluke and Censuswide, 61% of manufacturers had unplanned downtime in the past year. It happens so often that it stops being an incident and becomes a pattern, one nobody tallies.
Unplanned downtime: how often it really happens
61% is a lot for something most factories would rather file under “it worked out in the end”. Yet that’s what the survey shows. Unplanned downtime doesn’t only hit a small group of companies with old machines. It hits the majority of manufacturers, regardless of country or sector.
And it isn’t a one-off. Among those affected, 48% have six to ten breakdowns every week. For almost one in five, it’s up to twenty a week. At the largest manufacturers, with more than 50,000 employees worldwide, the share is even higher: 40% of them have more than ten breakdowns a week.
How long a breakdown lasts doesn’t make it better. 45% of companies report outages of up to twelve hours. For 15%, a breakdown lasts as long as 72 hours, three full production days. That isn’t a machine briefly giving up. That’s a production line taking a long weekend off without asking.
What unplanned downtime costs you, in hard numbers
The costs of unplanned downtime add up quickly. Across the factories surveyed, the total comes to $852 million a week, a figure that’s hard to picture. Totals like that say little about what a breakdown costs your factory. For that, you need to zoom in.
What an hour of downtime really costs breaks down into a few clear items: the labour cost of the people standing idle, the fixed costs of the machine itself, and the margin you lose on what isn’t produced in that hour. Add any repair costs and quality losses after the restart, and you have a figure that fits your production line.
Now multiply that figure by how long a typical breakdown lasts and how often it happens. At almost half of the affected companies surveyed, that’s six to ten breakdowns a week, and the cost piles up faster than most annual budgets allow for.
Why it happens more often than you think
A single root cause would make things easier. There isn’t one. Supply chain disruption, such as parts held up in transit or a supplier who delivers a day late, is a factor at 35% of factories in the survey, about as often as power cuts or other utility outages. New regulations, extreme weather and geopolitical tensions are cited about as often, even though they aren’t what the maintenance team tackles first thing in the morning.
Many operations managers will say downtime isn’t that bad at their site. That’s what you’d expect if you only count the big incidents, the day the whole line went down and everyone still remembers it. The smaller, recurring breakdowns count for much less in memory, while they quietly pile up week after week. If you mainly rely on reactive maintenance, you often only see the pattern after the machine has stopped.
What this means for your factory
If six out of ten manufacturers experience this, the chances are slim that your factory is the exception. It’s more likely that it’s already happening, without anyone really noticing. A line that stutters for twenty minutes because a bearing seizes is downtime too. It just gets fixed on the spot and disappears from view just as quickly. By the end of the day, with the next deadline in sight, nobody gives it another thought.
In our conversations with operations managers, we rarely hear an annual figure. What we do hear is a story about that one breakdown that keeps coming back, or that one part that has to be ordered again and again. The feeling is there, but the figure usually isn’t, and the gap tends to show up first in OEE, if it is tracked at all. That’s where awareness begins.
The Fluke and Censuswide figures show something few manufacturers see: downtime isn’t an accident. It’s a recurring cost that stays invisible until someone adds it up.
Curious what unplanned downtime costs your factory? Calculate it yourself with the Summix downtime calculator and get a first estimate in a few minutes.
