# OEE Availability Rate

Operations · `Availability Rate` · verification: source checked

Availability rate is one of the three elements of Overall Equipment Effectiveness (OEE). It measures downtime losses from equipment failures and adjustments as a percentage of scheduled time. It is multiplied by performance rate and quality rate to calculate OEE.

## Specification

| Property | Value |
|---|---|
| Kind | metric |
| Origin | Total Productive Maintenance (TPM) |

## Connected

- Related: [Overall Equipment Effectiveness](https://machineschema.com/operational/oee.md)

## Study notes

- The document describes OEE as a Total Productive Maintenance (TPM) measure.
- OEE is calculated as Availability Rate x Performance Rate x Quality Rate.
- The worked example uses availability 90%, performance 95% and quality 99% to obtain 84.6% OEE.
- The six major losses listed are failures, adjustments, minor stoppages, reduced operating speeds, scrap and rework.
- Some companies add other measures to the six major losses.

## Sources

1. [Overall Equipment Effectiveness - Lean Enterprise Institute](https://www.lean.org/lexicon-terms/overall-equipment-effectiveness/) (accessed 2026-10-25)

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Source page: https://machineschema.com/operational/oee-availability  
JSON: https://machineschema.com/operational/oee-availability.json  
License: CC BY 4.0 (https://creativecommons.org/licenses/by/4.0/). Cite Machine Schema and the original sources.