OEE & Factory Performance calculator
Unplanned Downtime Ratio Calculator
Calculate unplanned downtime ratio from unplanned downtime and available time. Two counts and a target give you a rate plus how far you are from where you need to be.
What this calculator does
- Calculate unplanned downtime ratio from unplanned downtime and available time.
- Use it when unplanned downtime ratio in oee and factory performance needs a clean rate and gap-to-target you can put on a tier board.
- Turns affected quantity, total quantity, reference target into a rate for unplanned downtime ratio in oee and factory performance.
Formula used
- Rate = affected quantity รท total quantity
Inputs explained
- Affected quantity: undefined
- Total quantity: undefined
- Reference target: undefined
How to use the result
- Use it when unplanned downtime ratio in oee and factory performance is being reviewed against a KPI.
- Trend matters more than a single snapshot; pull the result for the last several periods before you act.
Common questions
- How does this unplanned downtime ratio calculator help my oee and factory performance team? Calculate unplanned downtime ratio from unplanned downtime and available time. You get a rate you can defend before quoting, scheduling, or sign-off.
- Where do I get the inputs for this oee and factory performance calculator? affected quantity, total quantity, reference target usually move the rate most. Pull from measured oee and factory performance runs, supplier data, and recent quotes rather than memory.
- What do I do with this number? Use the gap to target to prioritize the next oee and factory performance kaizen or corrective action.
- What should I verify first? Confirm the counts came from the same time window and the same scope; mismatched scope is the most common error.
Last reviewed 2026-05-12.