Performance Indicators

The following are some examples of well-proven performance indicators

Overall equipment effectiveness (%)

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OEE

Availlability(%)
x
Performance(%)
x
Quality(%)

This metric is a measure of equipment or asset performance based on actual availability, performance efficiency and quality of product or output when the asset is scheduled to operate. Overall equipment effectiveness (OEE) is typically expressed as a percentage.

Uptime

∑(operating times)

This measure is the amount of time a piece of equipment is in production. This is the time it is actually working.

Availability (%)

Availability

Uptime
/
Planned operating time

This metric is the percentage of time that the asset is actually operating (uptime) compared to when it is scheduled to operate. This is also called operational availability.

Global downtime

Total Downtime

Planned downtimes
+
Unplanned downtimes

This measure is the amount of time a piece of equipment cannot produce.

Mean time between failures

MTBF

∑(operating times – failure duration)
/
(amount of failures)

This metric is the average length of operating time between failures for an asset or component. Mean time between failures (MTBF) is usually used primarily for repairable assets of similar type.

Mean time to failure

MTTF

∑(operating times)
/
(amount of equipments)

This metric is the average length of operating time to failure of a non-repairable asset or component (e.g., light bulbs, rocket engines). Another term, mean time between failures (MTBF), is primarily used for repairable assets and components of similar type. Both terms are a measure of asset reliability and are also known as mean life.