What is unplanned downtime?
Unplanned downtime is production time lost to events the plant did not schedule, mainly equipment failures. It is the most expensive form of lost capacity because it combines lost output with emergency labour, expedited parts, and knock-on disruption.
Benchmark
| Benchmark | |
|---|---|
| Good | World-class operations push unplanned downtime toward a low single-digit share of available time. |
| Warning sign | Double-digit unplanned downtime as a share of available time usually means significant, recoverable loss. |
Why it matters
Unplanned downtime is where lost revenue and emergency cost meet. A single hour can cost many multiples of the repair itself once lost margin, overtime, and expediting are counted. It is almost always understated because the full cost is spread across production, maintenance, and procurement budgets.
How to improve it
Capture downtime by cause, attack the largest repeat causes with defect elimination, shift spend from reactive to planned, and protect preventive work on critical assets.
Frequently asked questions
How much does unplanned downtime cost?
What is the difference between planned and unplanned downtime?
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