OEE as a percentage can be calculated by either dividing what was actually produced against what in theory should have been produced if the equipment ran in its ideal state or by multiplying the Availability, Performance and Quality measures. To be able to better determine what is contributing to the greatest loss and so what areas should be targeted to improve the performance, these categories have been subdivided further into what is known as the ‘Six Big Loses’ to OEE. The reason for identifying the losses in these categories is so that specific countermeasures can be applied to reduce the loss and improve the overall OEE.

 OEE Explained! (OFX Academy)

OEE & Six Loss Calculator

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Remember: if can’t measure it, you can’t manage it! You must first have reliable numbers to drive sustainable improvements;  click here if you need help with data gathering, or find the right plant floor data solution (opens in a new page)

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  • Availability

  • Six Loss Analysis
  • Planned Downtime Loss
  • Breakdown Loss
  • Minor Stop Loss
  • Speed Loss
  • Rejects in process loss
  • Rejects after changeover loss


Do you know what to focus on to improve OEE? Struggling to interpret data? Our customised six loss counter measures direct you to fast effective action plans to minimise productivity losses.

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